On the surface, these two phones look evenly matched — both pack 12GB of RAM, 256GB of storage, an 8-thread CPU built on a 4nm process, and identical DirectX 12 and OpenGL ES 3.2 graphics support. Dig deeper into the architecture, however, and meaningful differences emerge. The Moto G57 Power runs on the Qualcomm Snapdragon 6s Gen 4, a mid-range chip with a peak CPU cluster of 2.4 GHz. The Xiaomi 15T is powered by the MediaTek Dimensity 8400, which features a prime core clocked at 3.25 GHz alongside three performance cores at 3 GHz — a notably more aggressive clock speed profile that translates to faster single-core tasks, snappier app launches, and stronger sustained performance under load.
Where the gap becomes most striking is in memory subsystem performance. The Xiaomi 15T operates with 4 memory channels and a maximum memory bandwidth of 68.2 GB/s, compared to just 2 channels and 17 GB/s on the Moto G57. That is a four-times bandwidth advantage — a figure that matters most in GPU-intensive workloads, high-resolution gaming, and any scenario where large amounts of data need to move quickly between the processor and RAM. Paired with a faster RAM speed of 4267 MHz versus 3200 MHz, the Xiaomi 15T's memory architecture is substantially more capable. Its chipset also supports a maximum memory amount of 24GB, indicating headroom for higher-spec configurations, while the Moto G57 is capped at 12GB.
For everyday tasks like messaging, social media, and light multitasking, both phones will feel competent. But for gaming, video editing, or simply keeping many apps active simultaneously, the Xiaomi 15T holds a clear and well-rounded performance advantage — driven by its faster CPU cores, superior memory bandwidth, and a more scalable memory architecture.