The performance gap between these two devices is substantial and consistent across every benchmark metric. The iPhone 17 Pro's Apple A19 Pro chip scores 2,707,681 on AnTuTu versus the Poco X7 Pro's 1,663,422 on the MediaTek Dimensity 8400 — a roughly 63% lead. Geekbench 6 tells the same story: the iPhone's single-core result of 3,781 is more than double the Poco's 1,583, which is particularly significant because single-core performance governs the snappiness of everyday tasks like app launches, UI responsiveness, and web browsing. The multi-core gap is similarly wide (9,553 vs 6,137), confirming the iPhone's advantage extends to sustained, parallelized workloads like video editing and complex computation.
Under the hood, the architectural differences explain these results. The A19 Pro is built on a 3 nm process versus the Dimensity 8400's 4 nm, giving it a fundamental efficiency and transistor-density advantage. Memory bandwidth on the iPhone reaches 78.8 GB/s compared to 68.2 GB/s on the Poco, and its 16 MB L2 cache dwarfs the Poco's 1 MB — a dramatic difference that reduces how often the CPU must reach out to slower RAM, keeping performance consistently high under load. GPU clock speed also favors the iPhone at 1490 MHz versus 1300 MHz. One notable counterpoint: the Poco X7 Pro supports up to 24 GB of maximum RAM versus the iPhone's ceiling of 12 GB, which could benefit heavy multitaskers who keep many apps open simultaneously, though both ship with 12 GB in these configurations.
On storage, the iPhone 17 Pro's 1024 GB option offers double the Poco's 512 GB maximum, which matters for users with large media libraries. The iPhone 17 Pro holds a decisive and clear performance advantage in this category — driven by its chipset generation, cache architecture, and benchmark dominance across the board.