The Apple a15 is roughly equivalent to the Snapdragon 895.
At present, there is no Snapdragon chip comparable to the a15, and the latest Snapdragon 8gen1 performance is only about 60% of the a15. The a15 uses a 5nm process while the latest Snapdragon 8gen1 uses a 4nm process. In the geekbench5 running score, the Snapdragon 8gen1 has a single-core score of 1200 points and a multi-core score of 3810 points. The a15's single-core 1724 points and multi-core 4625 points have crushed the latest Snapdragon 8.
At present, the best 888 of the Snapdragon is still unable to beat the a14, and the a15 is estimated to fail.