Youre thinking of the screens refreshrate that is max 120Hz and variable, compared to the 60hz a "regular" non-pro iPad has.How good is the iPad pro 2nd generation for gaming? just notice has 120 GHz as well..
Performance wise, it's still fast. And I say it as someone who uses A12x and M1 iPads regularly. But I would worry about the white spots much more than about performance