I tend to prefer Jazz 2 overall, but there’s a certain je ne sais quoi that didn’t carry over from the first game.
Despite that, it has much more varied enemies with much stronger animation, the wacky and slightly unsettling artstyle is still brilliant, and the music is out of this world. I think perhaps the levels feel a bit unnatural at times, and it’s painfully obvious they’ve used tilesets. But as a general experience, Jazz 2 wins out for me.