I've ridden both stock Surftech models (Rasta & Morpheus). They felt pretty much similar to me except the Rasta felt really big and too much board for my weight (120lbs) and high wind, choppy conditions. I liked the Morpheus better. I rode the Loaf, which is super thick, and it was a bouncy mess for my weight and conditions.
Thanks for the feedback Cynbad. The drawback & bounciness w/the different volume was one thing I actually didn't even consider, but have also experienced before..I rode a friends Underground surfboard ('07 or '08) and first thing I noticed was how it sat deeper in the water, and didn't bounce as much.(as my thick Placebo Surfsk8 board)
I friend of mine has an Exile Skimboard that I'm gonna try out as soon as I get a chance too. It looks like it has deeper rocker, esp. at the nose, so I'm curious to how it rides powered in waves/chop.
Domo~,
K.