When I tested a 15” MBP with an i7 and touch bar vs my M1 Air the Intel Mac throttled down 30% immediately and the M1 barely throttled towards the end. The test was a 4K transcode in handbrake and the M1 air was only 10-15 minutes behind.

I’ll try to replicate the test with an M3 13” vs the 15” touchbar intel. Don’t have my MBPs at work.