Have you had any experience with the two instruments?
Out of experience, the clarinet has a higher learning curve, the baritone is easier to learn. The only thing is once you get good at clarinet, you get really good. I've never seen just plain good clarinet players, only stuffty ones or amazing ones.
As for baritone, I've never personally learned it, but since I'm a brass player I find it really easy to play.
Down to my personal preference, baritone. The clarinet is a vile, disgusting instrument to play. The fingerings make no sense, it's just a mess.