Anyone know brand what the Baker OG mellow shape compares to ? I’m looking at either an 8.1 or an 8.25.
Depends on what you want. There's probably a comparable deck from just about any woodshop. I've never actually skated a baker deck but I recently flipped one of the AR reapers that people are paying way too much for on eBay and I did check it against some of my other stuff. There's a PS mold that strangelove uses that's pretty similar in terms of both concave and kick angles.
I would actually consider the baker mold to be more of a moderate concave than mellow, although it is mellow for a BBS deck. If you want something really mellow but similar feeling then PGI (blood wizard, skate mental, Maxallure, natural koncept etc) are quite flat but have a similar stiffness. There's a number of PS molds that are mellow as well (toy machine is the most popular one) and SC e mold decks are nice and mellow as well, but aren't always easy to find.