The Redmi K50 Pro and OPPO Find X5 Pro are the only MediaTek Dimensity 9000-powered devices on the market at the moment. Both phones have now officially been listed on AnTuTu, with CPU and GPU scores providing further performance insight especially relative to the Snapdragon 8 Gen 1.
https://www.notebookcheck.net/Snapdragon-8-Gen-1-vs-Dimensity-9000-More-Redmi-K50-Pro-CPU-and-GPU-benchmark-numbers-are-in.611264.0.html