Nothing Phone (3) vs Xiaomi 15

Nothing Phone (3)

A sharp 6.7-inch LTPO AMOLED with 120Hz and up to 2,000 nits peak brightness delivers a smooth, vibrant viewing experience.

• The LTPO OLED panel is bright, responsive, and color-accurate — a significant improvement over the Phone (2) display
• Peak brightness of 2,000 nits is good but falls behind Samsung and Apple flagships hitting 3,000 nits

Xiaomi 15

The 6.36-inch 1.5K LTPO OLED is sharp, vibrant, and incredibly bright at 3,200 nits peak (tested up to 3,593 nits HDR). Ultra-narrow 1.38mm bezels and high-frequency PWM dimming above 3,000Hz round out an excellent display package, though OLED smear at lower brightness is a noted concern.

• Peak brightness tested at 3,593 nits in HDR — among the brightest compact phone displays available
• Ultra-narrow 1.38mm bezels with excellent color accuracy in Original Color PRO profile
• OLED smear visible at lower brightness levels (0-70% range) — a recurring user complaint

Nothing Phone (3)

The triple camera system co-developed with Samsung is a major upgrade, though processing still trails the best in challenging conditions.

• The 50MP main camera produces detailed, well-exposed shots in good light that compete with phones costing $200 more
• Telephoto lens addition brings welcome versatility with clean 3x optical zoom results
• Night mode and low-light processing lag behind Google and Samsung — images lack the computational magic of Pixel phones
• Video stabilization and dynamic range are adequate but noticeably behind iPhone and Galaxy flagships in side-by-side tests

Xiaomi 15

The triple 50MP Leica system shines with its main sensor and improved 2.6x telephoto, earning a DxOMark score of 146. Leica color profiles produce natural, pleasing images with excellent dynamic range. The ultrawide camera is the clear weakness, with noticeably more noise in low light and no autofocus.

• 50MP main Leica Summilux camera delivers excellent photo quality with natural colors and strong dynamic range
• 2.6x optical telephoto is a meaningful upgrade over the Xiaomi 14 — sharp and versatile
• Ultrawide camera is the weakest link — subpar quality, no autofocus, noticeably more noise in low light
• DxOMark camera score of 146 — good but not class-leading among 2025 flagships

Nothing Phone (3)

Snapdragon 8 Elite puts the Nothing Phone (3) in the same performance tier as Samsung Galaxy S25 and OnePlus 13.

• Snapdragon 8 Elite provides genuinely flagship-level performance — gaming, multitasking, and app launches are all top-tier
• Nothing OS 3 is lightweight enough to let the hardware shine, with smooth animations and minimal background resource consumption
• Thermals are well managed with the aluminum frame acting as a heat sink, keeping sustained performance respectable

Xiaomi 15

The Snapdragon 8 Elite with 12GB RAM delivers flagship-tier performance that's smooth and snappy for everyday use, gaming, and multitasking. However, the compact body struggles to dissipate heat under sustained loads, causing notable thermal throttling during extended gaming sessions.

• Snapdragon 8 Elite scores ~2,990 single-core and ~9,114 multi-core on Geekbench 6 — genuinely fast
• Thermal throttling is a real issue — fails to complete 3DMark GPU stress tests and gets uncomfortably hot
• CPU throttles to 72-77% of peak under sustained load — compact chassis limits cooling capacity