Sharpness is where these two screens diverge most visibly. The Nothing Phone 3 packs a 1260 x 2800 resolution into its 6.67″ panel, yielding a pixel density of 460 ppi — comfortably in the territory where individual pixels become imperceptible to the naked eye. The Nothing Phone (3a) Pro runs a 1080 x 2392 panel across a slightly larger 6.77″ screen, landing at 387 ppi. Both are perfectly watchable, but side by side the Phone 3 will render finer text, detailed photography, and high-resolution video with noticeably more clarity.
The (3a) Pro counters with a striking contrast advantage: its rated contrast ratio of 5,000,000:1 is five times that of the Phone 3's 1,000,000:1. In practice on an OLED panel this translates to deeper perceived blacks and punchier highlights in dark scenes, which can make HDR content appear more dramatic. The Phone 3 also carries branded damage-resistant glass — a real-world durability benefit — while the (3a) Pro does not, making the latter more vulnerable to surface scratches over time. Everything else — refresh rate, touch sampling, typical brightness, HDR10/HDR10+ support, and Always-On Display — is identical between the two.
Overall, the Nothing Phone 3 holds the display edge for most users. Its resolution and pixel density lead is meaningful for everyday readability, and the added screen protection is a practical plus. The (3a) Pro's superior contrast ratio is a genuine strength for media consumption, but it is not enough to outweigh the sharpness and durability gap in a head-to-head comparison.