I love both but I have to go with the Caribbean. Both are very good at what they do but I have a couple preferences that sway me towards the Caribbean..
1) Choil vs no choil. I do like the way the Shaman feels ON the choil, but it doesn't feel quite as natural behind the choil for me so I can't see myself using it that way so the idea of multiple grip options is lost on me. Because I'd just assume use the choil as my standard grip, I'd rather the grip were 100% on the handle and the blade gain cutting edge.
2) Edge to handle closeness. Despite the fact that I'd use the choil on the Shaman as my standard grip, which puts my finger right next to the edge, I prefer having a bit of handle between my finger and the material I'm cutting. The Caribbean grip creates a nice guard/guide for material to slide along when making deep cuts. On the Shaman that contact area is my finger which isn't ideal.
3) Edge length. It isn't a lot but every bit counts. Since I don't really have a need for the choil, it's wasted space. The fact that I get Military blade length in a Para 2 sized package is a big win for the Caribbean.
Now, the Shaman does have two things I really wish the Caribbean had, like a more round handle and no thumb ramp. Those are the first two changes I'd make to the Caribbean if I had the power to do so.
SHARPEN IT LIKE YOU LOVE IT, USE IT LIKE YOU HATE IT