looking at those Coaster stock dims + pics, aside from the more subtle design mods of coupla years R&D, seems the biggest difference between the Coaster and the Carver is how the bottom angles up from the back of the box, a la Dart, Super K2, Pilot Mid, Armie Midlength etc, vs the flat-all-the-way-thru tail of the Coaster.
Not about to replace my Carver with a Coaster, but interesting to test em back to back. See if the tail and other mods significantly impact how early it takes off
....was hoping Bryan'd go there. but he's gone for a skinny Pilot instead