Oppo Find X9 Ultra vs Xiaomi 15

Oppo Find X9 Ultra

A 6.8-inch LTPO OLED with up to 144Hz and very high real-world brightness — among the brightest screens on any phone outdoors.

• 6.8-inch LTPO OLED panel up to 144Hz, with a maximum brightness around 1,800 nits and dimming as low as 1 nit.
• Hits a staggering ~3,600 nits of peak HDR brightness, making it incredibly easy to see and edit shots in direct sunlight.
• In manual mode the display peaks at 840 nits, rising to ~1,156 nits in auto on a 75% white patch and up to ~1,932 nits in the native gallery app.
• The smoother 144Hz panel and 3,600-nit brightness outperform Samsung's display.

Xiaomi 15

A small but flagship-grade flat AMOLED with class-leading peak brightness. Outdoor visibility is a recurring highlight.

• An independent test clocked the display at 3,175 nits at 20% APL — bright enough to comfortably read in direct sun.
• The phone offers 3,200 nits of peak brightness; a year on, the screen still feels flagship-level for YouTube, Netflix and gaming.
• There is a dedicated sunlight mode you toggle in settings that boosts the panel up to 3,200 nits.
• Whether watching video or gaming, after a year the display still feels flagship level.

Oppo Find X9 Ultra

The reason to buy it. A Hasselblad-tuned quad system with the most versatile zoom on any phone, a true 10x optical periscope and an optional 300mm Hasselblad teleconverter. Near-universally praised, with only minor sharpness and ultrawide caveats.

• A 200MP main, 200MP 3x telephoto, 50MP 10x optical telephoto and 50MP ultrawide, all Hasselblad-branded — camera-first overkill in the best way.
• Consistently great photos, sharpness and dynamic range with really good color calibration — this phone did basically everything right in the camera department; an incredibly well-rounded smartphone camera.
• Is this the best camera phone ever built? — my new favorite camera phone and one of the best Android phones I've ever used.
• Even after a direct shootout, still the best camera phone I've ever used.
• Detail is very good, but sharpness remains a bit underwhelming on the main camera.
• The ultrawide is probably the weakest part of the setup — with the first three cameras taking so much space, Oppo reused the Samsung GN5 sensor here.
• Night-mode processing — color, contrast and exposure handling — is so much better than the Galaxy S26 Ultra's, and the ultrawide is now one of the best for detail preservation.
• The optional 300mm Hasselblad teleconverter delivers ~13x (300mm) optical-feel zoom that retains real telephoto sharpness, extending to ~60x (1380mm).

Xiaomi 15

A Leica-tuned triple 50MP system that reviewers rate among the best you can get in a compact phone, with a large 1/1.3-inch main sensor and a versatile 60mm telephoto. Pro-grade video is strong via the main sensor.

• This is one of the best and most capable camera setups you can currently get in a relatively compact phone.
• Xiaomi swapped the Xiaomi 14 sensor for a new JN5 telephoto with a 60mm focal length, paired with a large 1/1.3-inch main sensor.
• The telephoto offers 2x optical zoom (46mm) but you can still push to ~6x with an impressive level of detail — a strong pick for buyers who don't need extreme reach.
• Portrait shots were compared directly against a Sony a6100 with a 23mm f/1.4 lens (≈35mm equivalent, ~f/2.1 depth of field) and held up well.
• The main camera can shoot 8K30 from the main sensor, and that 8K footage is roughly 50% more detailed than 4K30.

Oppo Find X9 Ultra

Snapdragon 8 Elite Gen 5 puts it near the top of the benchmark charts, but sustained-load stability is mediocre and Oppo deliberately throttles early to control heat.

• As expected, the Find X9 Ultra earns excellent benchmark scores near the top of the charts.
• A 3D ultrasonic fingerprint scanner Oppo claims is 35% faster and 33% more reliable, plus vapor cooling to dissipate heat through the aluminium frame for better sustained performance.
• 3DMark returned ~7,530 best-loop and ~3,682 low-loop with only ~49% stability, and peak performance didn't last a minute — weak sustained behaviour.
• Genshin Impact stayed consistently above 50fps and remained smooth even when throttling to ~30fps after ~16 minutes at 41.5°C, at under 4W power draw.
• Honor of Kings averaged 144fps over 30 minutes at max settings; Genshin held max 60fps before stabilizing near 50fps.

Xiaomi 15

Snapdragon 8 Elite makes it one of the fastest small phones available, and it holds sustained performance better than larger rivals — but it still runs warm under prolonged synthetic and 4K-video loads.

• It runs the Snapdragon 8 Elite — pretty much the fastest chipset available on any smartphone at launch.
• In a stress test against the Galaxy S25 and Oppo Find X8, the Xiaomi 15 won on stability (~72%) versus the S25's 67% and the Find X8's 58.6%, and also had the upper hand in Geekbench.
• Despite being a much smaller phone tested in hotter conditions, it sustained better performance and smoothness than an iQOO 13 in a 10-loop benchmark; an external cooler lifted the lowest-loop score 14%.
• The chipset swap to the Snapdragon 8 Elite is welcome, but just like last year the Xiaomi 15 still struggles to keep it cool under prolonged loads.
• A year on the flagship chipset is still very powerful and the phone's performance remains solid in 2026.

Oppo Find X9 Ultra

A genuine highlight: a 7,050mAh silicon-carbon cell that posts some of the best endurance numbers of any 2026 flagship, with fast 100W wired and 50W wireless charging.

• Draws power from a 7,050mAh battery — a sizeable increase over the previous generation — with 100W SuperVOOC wired and 50W AirVOOC wireless charging.
• Earned an active-use battery score of over 20 hours; with the SuperVOOC charger it went 0–75% in 30 minutes and to full in 45 minutes.
• After ~10 hours of continuous use starting at 7am it still had 53% battery, regularly getting 8–9 hours of screen-on time and ~40% left after a 13-hour day.
• A PCMark synthetic loop returned 15 hours 2 minutes, and 100W SuperVOOC charging took ~49–52 minutes (the charger isn't included).
• With moderate usage you can easily expect more than 2 days of battery life — Oppo finally feels like a truly complete product.
• Charges 0–100% in about 52 minutes on the official 80W charger in a head-to-head charge test.

Xiaomi 15

A ~5,240mAh cell that beats a Galaxy S25 in head-to-head rundowns and recharges very fast over both wire and wireless — though a HyperOS idle drain divides reviewers.

• The Xiaomi 15 packs a larger ~5,240mAh battery versus a Galaxy S25's ~4,000mAh while only being 27g heavier, and ended a head-to-head rundown at 30% vs the S25's 13%.
• It charges in around 45 minutes with the 90W adapter in the box, and the reviewer had zero issues with battery life in normal mixed use.
• From a fully dead battery a measured charge test reached 66% in 45 minutes, 91% at 1h05m and a full 100% in about 1h15m.
• It also supports 50W wireless charging — faster than typical flagship wired speeds — though there are no Qi magnets built in, so you need a 50W-compatible mat for top speed.
• Xiaomi says battery can run roughly 25% longer than the Xiaomi 14.

Oppo Find X9 Ultra

ColorOS 16 has matured a lot and is fast and smooth, but it still trails Samsung and Google on AI depth and feels iOS-derived to some — the phone's clearest weak point relative to its hardware.

• ColorOS 16 feels like one of the best versions yet.
• It's a good Android experience but not on par with the Galaxy experience for AI features and tool integration, and portrait autofocus struggles in some low-light conditions.
• For me it's the best version of Android I've ever used — light, fast and smooth with no major issues.
• The hardware is superior to the latest Samsung, but the software feels like an imitation of iOS.
• With a bit of tweaking and updates, Oppo's software and camera engineers can make this even better — there's clear headroom.

Xiaomi 15

HyperOS is fast and feature-rich (IR blaster, long update commitment) but the bloat, ads and unremovable apps remain the phone's most consistent complaint, and big updates have shifted benchmark behaviour.

• Xiaomi committed to roughly 4 years of major Android OS updates and 5 years of security patches.
• Owners dislike that certain pre-installed apps can't be uninstalled and that HyperOS surfaces ads and unsolicited notifications even on a flagship.
• The HyperOS 3 (Android 16) update is described as one of the riskiest software moves Xiaomi has made; everything still feels like butter day-to-day but Geekbench scores have declined with every major HyperOS update.
• After the Android 16 / HyperOS 3 update many owners report better battery life, and the IR blaster remains a favourite Xiaomi touch.
• A year on the software support has kept the phone feeling fresh and reliable, with a smooth overall experience.

Oppo Find X9 Ultra

Premium-priced and hard to buy in many markets, but reviewers broadly conclude it out-cameras the S26 Ultra and Pixel and edges the Vivo X300 Ultra on usability.

• Its main compromises are the ~€1,699 price, large 236g body, occasional software concerns and limited availability in some markets.
• It feels like Oppo wanted to make the camera first and just happened to also create the best Android phone you can get right now — though it won't win every year-end award.
• The base Find X9 Ultra starts at 7,499 yuan in China — roughly £814 / ~$1,100 — but the heaviness and visual pressure are the first impression.
• The closest rival is the Vivo X300 Ultra, but the X9 Ultra wins by having a more user-friendly OS.
• The Hasselblad alliance delivers a phone that genuinely challenges the Galaxy S26 Ultra on cameras.

Xiaomi 15

Widely called the best compact flagship of 2025, but it's priced like a flagship and only an iterative bump over the Xiaomi 14 — and in the US a Galaxy S25 or iPhone 16 is cheaper and easier to buy.

• One of the best compact flagships on the market, if not the best one — reviewers were left quite impressed.
• Pitched directly as 'The Best Compact Flagship of 2025?' in a benchmarks-and-blind-camera comparison against the iPhone 16 Pro Max and Galaxy S25 Ultra.
• A compact flagship with excellent battery life, though it shares near-identical design, display and cameras with its predecessor — it can feel like a fairly minor update.
• A new Xiaomi 15 (12GB/256GB) retails around €999 globally; used prices have dipped to €700-800 on eBay/Swappa — a solid 20-30% drop that makes the used market tempting.
• Compared with a Galaxy S25 or iPhone 16 — both cheaper and easier to buy in the US — the Xiaomi 15's price feels premium for what is essentially an iterative upgrade over the Xiaomi 14.