They'd be identical to the M1 Pro. I own an M1 Pro 14".
I've had a few MacBooks to compare and it beats them all. By a lot. Like not even close. Also does surround sound that actually works (i.e., it can do directional sound so things sound like they're somewhere in 3d space around your head) - and you won't get that out of a YouTube video comparison being played back on your current machine.
Previous machines I've had
2011 15" Pro
2015 13" Pro
2020 13" Air
I also regularly deal with enterprise PC notebooks. They're crap.
It also stomps on the iPad Pro 10.5 I had, and the iPad Air 5 I currently have.
If in doubt find one in store and do some testing - but suffice to say the 14" Pro speakers are the best laptop speakers I've ever used by a lot. I would wager the 16" are better though purely due to size.