I'd be interested to see you run a Digital Foundry-sort of test on them: download Resident Evil 7 from the Mac App store and see what sort of resolution you can run the game at to maintain 30fps gameplay. This would give us a really good idea of the graphics performance between the 2.

You could also download PhotoCatch (which is free) and see how the M1 fares against the M2 for processing some on-device Photogrammetry which is notoriously taxing on a processor. Again, this would give us an idea of how the GPU fares.