iPhone 17 vs Vivo X300 Ultra

iPhone 17

The A19 (non-Pro) chip with 8GB of RAM is genuinely close to the A19 Pro in everyday use — Gizmodo's Geekbench tests had the iPhone 17 only 1.3% behind the iPhone 17 Pro on single-core and 9.5% behind on multi-core. The gap shows up almost exclusively under sustained heavy 3D gaming load, where the lack of the Pro's vapor-chamber cooling causes the iPhone 17 to throttle and heat up. Ars Technica's tests even found the iPhone 17 outperforming the more expensive iPhone Air thanks to better heat dissipation.

• Geekbench multi-core hits 7,823 and single-core 3,216 — the iPhone 17 is roughly 1.3% slower than the iPhone 17 Pro for single-core and 9.5% slower for multi-core, which is far closer than the price gap would suggest.
• The iPhone 17 is often actually faster than the iPhone Air, despite both phones using five-core A19-class GPUs — Apple's thinnest phone has less room to dissipate heat, which leads to more aggressive thermal throttling.
• Cranked Assassin's Creed Mirage to max settings and the iPhone 17 stuttered, froze a few times and got really hot — heavy mobile gamers should still consider the Pro for the vapor chamber.
• The iPhone 17 speedily handled any task I threw at it — no stutters, no struggles, and the A19 plus 120Hz display made Destiny: Rising play silky smooth even in chaotic skirmishes without overheating.
• 8GB of RAM is currently the floor for Apple Intelligence and there's no felt difference in day-to-day performance between the iPhone 17 and the iPhone Air — but 12GB on the Pro and Air may age better as AI features grow.
• The A19 is still literally one of the most powerful single-core chips on the planet right now and has a ton of headroom for the future — paired with the new selfie camera and 256GB storage, this is the best iPhone deal in years.
• The A19 chip on the iPhone 17 is barely 8–10% faster than the A18 chip on the iPhone 16 — a difference most users will never notice with their day-to-day tasks.

Vivo X300 Ultra

Snapdragon 8 Elite Gen 5 plus Vivo's custom imaging silicon delivers flagship benchmark numbers and strong gaming, but the camera-heavy hardware runs hot — sustained stress tests show roughly 60–65% stability and the camera app warms it up fast.

• At the heart is Qualcomm's current flagship Snapdragon 8 Elite Gen 5, supplemented by Vivo's custom VS1 and V3-Plus imaging chips.
• It boots in 16 seconds (vs 21s for the S26 Ultra and 19s for the iPhone 17 Pro Max) and posts an AnTuTu score over 3,800,000, stronger than Samsung.
• In a prolonged stress test it throttled CPU performance to about 60% of peak — in line with other high-powered flagships — and 3DMark stability landed around 63–66%.
• It gets a bit hot after 30–40 minutes of gaming, but with no throttling even past an hour and never uncomfortable to hold; boost mode at max graphics gives around 4 hours of Wuthering Waves on a full charge.
• Native 120fps gaming with smooth/very-high graphics in many titles, with temperature barely crossing 35°C and power draw around 4W in battle-royale modes.

iPhone 17

The 3,692 mAh cell is up only marginally on the iPhone 16's 3,561 mAh, but the more efficient A19 chip and variable-refresh-rate display push the iPhone 17 to up to 30 hours of video playback (Apple's number) — eight hours more than the iPhone 16. Reviewers comfortably hit 5–6+ hours of screen-on time and end days with 15–25% remaining. Wired charging is 40W (50% in 20 minutes), wireless MagSafe is 25W. The OnePlus 13 and Xiaomi 15 still charge meaningfully faster, but versus other US-priced flagships this is competitive.

• After a week of use I'm consistently hitting more than six hours of screen-on time, with GPS, music streaming, and hours of doomscrolling — I have yet to find myself worried that my phone is going to die.
• Battery life has increased by 8 hours compared to the iPhone 16 — up to 30 hours of video playback versus 22 — and in normal use the iPhone 17 lasts about as long as the iPhone 16 Pro, from 8 a.m. to 6 p.m. with 20–25% left.
• I had 16 percent battery left by bed time after a 7AM-to-midnight day of email, Slack, music, calls, texting, Instagram and a few episodes of The Bear — with always-on display active the entire time.
• Charging hits 50% in about 20 minutes with a 40W adapter — faster than the iPhone 16 by 10 to 15 minutes, and a full 0–100% charge takes 85 minutes.
• Phone Arena's battery score is 5.9 out of 10 — below average for the price class. Battery life is good for a day, but not class-leading.
• The iPhone 17 reliably makes it from 7:30 a.m. to 1:00 a.m. with 15–20% left over, even on days with Personal Hotspot use and a few rounds of Pokémon Go — no midday top-up required.
• Apple slightly increased MagSafe wireless charging to 25W (with a 30W adapter) — same as the iPhone 16 Plus and a 3W increase over the iPhone 16.
• 40W charging is good but at maximum still lags far behind the Xiaomi 15 (90W) and the OnePlus 13 — comparatively slow charging is a real con.

Vivo X300 Ultra

Vivo grew the silicon-carbon cell 10% to 6,600mAh while keeping the body the same size. Real-world endurance is strong — ~16h active-use score, ~7h heavy screen-on, 13–14 hour days with charge to spare — and 100W wired refills it in under an hour, with 40W wireless.

• Vivo increased the battery by 10% to 6,600mAh despite the phone being practically the same size on paper.
• In our battery test it earned an active-use score of almost 16 hours; 100W charging took it 0–66% in 30 minutes and a full charge in 46 minutes, plus 40W wireless. A charger is in the box except in Europe.
• On the China version I'm finishing entire 13–14 hour days with 25–30% left; the global version keeps the 6,600mAh cell so battery life should comfortably last 12–13 hours of heavy use.
• Getting nearly 7 hours of screen-on time with very heavy usage from the 6,600mAh silicon-carbon unit, with 100W wired and 40W wireless charging support.
• After a 4-hour heavy-usage simulation the phone still had ~45% battery left, which is solid by today's standards, and 100W wired charging takes about 45 minutes to full.