I like both for the Finals, but I just think that Bucks team is such a physical mismatch for the Warriors. They play passing lanes and defend the 3 so well. It's like they were made in a lab to defeat the warriors mess with their ball movement, and defend the 3 so well. Giannis is a bigger mismatch than the Warriors biggest mismatch, Durant. They are the perfect storm to defeat them.
Still, total talent wise I'd say the raptors are closer in that area. It depends how the roleplayers on the Bucks react in the playoffs. Raptors have way more experience even if a lot of it is being whooped by Lebron.