I feel no difference, but that’s to be expected.
Just the “Kind” in Activity Monitor says Apple instead of Intel.
Startup time is faster, but it wasn’t so bad on my MacBook Pro w/ M1 Max. It’s hard to notice changes when you have the fastest Mac in the world (the Ultra is doubled, but same performance per).
The biggest change is memory consumption, because we’ve left Mono behind, and are now using Microsoft’s .NET.