My understanding is the Max/Ultra are mainly about increased GPU performance. Did you compare those against the M2 Pro beforehand?
You can see here the M2 Pro got an 80 benchmark and the M2 Max, the line above the commit, got a 72 (arbitrary numbers, for sure, but a real difference!):
https://github.com/devMEremenko/XcodeBenchmark/pull/393/comm...