Google Pixel 9a vs Xiaomi 15 Ultra

Google Pixel 9a

Bright 6.3-inch pOLED panel with 120Hz and 2,700 nits peak brightness, marred by thick bezels.

• Peak brightness of 2,700 nits makes it one of the brightest displays in its category, easily readable in direct sunlight
• Thick display bezels are wider than many competitors and make the phone look dated for a 2025 device

Xiaomi 15 Ultra

A stunning 6.73-inch 2K LTPO AMOLED with 120Hz, 3,200 nits peak brightness, and Dolby Vision support.

• 3,200 nits peak brightness is the highest of any smartphone tested, with excellent outdoor visibility and HDR performance
• 2K resolution with 120Hz LTPO delivers incredibly sharp, smooth visuals for gaming and media consumption

Google Pixel 9a

The 48MP main camera delivers flagship-adjacent quality with excellent computational photography, though the ultrawide struggles in low light.

• The main camera delivers terrific results with spot-on colors, well-judged white balance, and impressive low-light performance
• Portrait mode with nearly perfect subject detection rivals phones twice the price
• Ultrawide camera struggles in low-light conditions, producing soft and blurry images with limited detail

Xiaomi 15 Ultra

The crown jewel — a triple Leica camera system with a 1-inch main sensor, 200MP telephoto, and 50MP ultrawide that redefines smartphone photography.

• The 1-inch main sensor captures more light and detail than any competing smartphone camera — photos have a depth and quality that approaches dedicated cameras
• 200MP telephoto with 4.3x optical zoom produces incredibly detailed zoom shots that rival the Galaxy S25 Ultra's 5x periscope
• Leica color science produces warm, film-like tones with natural skin rendering that photographers love
• Video stabilization is the best on any Android phone, though color consistency and dynamic range in video still trail the iPhone

Google Pixel 9a

Tensor G4 delivers near-flagship performance with improved thermals, though 8GB RAM limits some AI features.

• Runs the same Tensor G4 as the Pixel 9 Pro with only 3% performance gap — virtually indistinguishable in real-world use
• Improved thermal management with vapor chamber keeps the phone consistent without significant throttling
• Only 8GB RAM means some AI features like Pixel Screenshots and background Gemini processing are unavailable

Xiaomi 15 Ultra

Snapdragon 8 Elite with 16GB RAM delivers the fastest Android performance available with excellent thermal management.

• Snapdragon 8 Elite with 16GB RAM makes this one of the fastest phones tested — no app or game can slow it down
• Liquid cooling system keeps sustained performance high with minimal throttling during extended gaming sessions
• 16GB RAM ensures smooth multitasking with dozens of apps in memory and efficient AI processing

Google Pixel 9a

The 5,100mAh battery delivers the best battery life of any Pixel, but charging is painfully slow.

• Largest Pixel battery at 5,100mAh delivers 13 hours and 8 minutes in testing — almost 2 hours longer than the Pixel 8a
• 23W wired charging takes over 90 minutes for a full charge — painfully slow compared to competitors offering 45W+
• Easily lasts a full day with heavy use including camera, gaming, streaming, and AI features with juice to spare

Xiaomi 15 Ultra

A 5,500mAh battery with 90W wired and 50W wireless charging delivers both excellent endurance and class-leading charging speeds.

• 90W wired charging fills the 5,500mAh battery from 0 to 100% in about 35 minutes — among the fastest in any flagship
• Battery easily lasts a full day of heavy use including intensive camera work and gaming
• 50W wireless charging is fast enough to replace wired charging for most daily use scenarios

Google Pixel 9a

Clean Android 15 with seven years of updates and most Pixel-exclusive AI features, limited only by RAM.

• Seven years of OS, security, and Feature Drop updates — the best update commitment in the mid-range segment
• Full access to Gemini AI, Circle to Search, Magic Editor, Best Take, Add Me, and Audio Magic Eraser

Xiaomi 15 Ultra

HyperOS 2 on Android 15 is feature-rich but divisive — powerful customization options are offset by ads and bloatware in some regions.

• HyperOS 2 is more polished than MIUI, with smooth animations, useful sidebar multitasking, and deep customization
• Pre-installed apps and occasional ads in system UI detract from the premium experience in some regional variants
• Four years of OS updates and five years of security updates — decent but short of Samsung and Google seven-year commitments