The P40 Pro and Mate 40 Pro are Huawei's two flagship phones. The P40 Pro has a 6.58-inch screen, while the Mate 40 Pro is equipped with a 6.76-inch screen. The P40 Pro is powered by the Kirin 990 processor, while the Mate 40 Pro has the more powerful Kirin 9000 processor. Both phones support 5G networks, and both have powerful camera systems, but the Mate 40 Pro has a higher camera configuration. In addition, the Mate 40 Pro also comes with a larger battery capacity and faster charging speed. Overall, the Mate 40 Pro is slightly ahead in terms of performance and features, but the P40 Pro is also an excellent phone choice.