The performance of the Snapdragon 870 is significantly better than the Kirin 820, both in terms of CPU and GPU. Snapdragon 870 is Qualcomm's high-end processor, using 7nm process, CPU core architecture uses 1, 3, 4 three cluster, of which A77 core frequency up to 3.2GHz, GPU model Adreno 650. The Kirin 820 is Huawei's mid-range processor, which also adopts the 7nm process, and the CPU core architecture adopts the three-cluster type of 1, 3, 4, among which the A76 main core frequency is 2.36GHz and the GPU model is Mali-G57 MP6. In Geekbench 5's single-core and multi-core running scores, the Snapdragon 870 has 1.5 times the performance of the Kirin 820 in both single-core and multi-core. So, if you're looking for more performance, the Snapdragon 870 is a better choice