It's a pow stick. Raised big shovel nose and a stiffer tapered tail. Trust me, it would float you just fine. It's not just about the size. If you're doing mainly tree runs, I'd stick with the 158.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz