So after gathering more information from the discord server, they seem to have came to the consensus that it doesn’t really matter which performance mode you play on. Apparently due to the update, stair skating has been nerfed, and certain enemy AI, such as the lickers, and G2 behaviors have been altered. This apparently evens out the playing field when it comes to playing on either performance mode.

This is actually something I’ve been wondering about as well. I asked in the discord, but the answers didn’t seem like they were too sure. If anyone knows the answer to this question, it would be very helpful.