They're basically the same board except the concave/centre spine thingie makes the 06 board track likes its on rails.
You can blast into a turn as fast as you like and the 06 model carves through and holds the speed all the way through. The 05 model was a bit looser and would tend to slide through the turns if your edging wasn't spot on.
The pads on the 06 are not stuck on and they are really easy to move and adjust. I like it a lot.
