It compares closely to the SD 8 Gen 2, Samsung is using.Pixel 8 Pro's Tensor G3 chip is only marginally better than purely Chinese-made Kirin 9000s.

Tensor G3 vs Snapdragon 8 Gen 2 vs Apple A17 Pro: Google Bets on Efficiency
Read our detailed comparison between Tensor G3, Snapdragon 8 Gen 2, and Apple A17 Pro to find out which is the most powerful mobile chipset.
