Clone Troopers all sound like Jango/Boba because of PT clone accent logic.
Mando sounds nothing like this because he’s not a clone.
Boba still sounds exactly like Jango in S2 because it’s the same actor.
But since this is a Season 2 spoiler thread you should mark it up. Everything else you said makes it unclear if you saw the show since that would clear all of this up anyway.
Ok my bad. I understand more now. But that being said, Morrison as Boba sounds nothing at all like he did as Boba in ESB.