James,
The basics are a different airfoil and wing taper, obvious differences in the fuselage (kind of Enigma like in the side area balance but smoother and more flowing in keeping with traditional CPLR style). Also, the extended pipe cavity for longer pipes and then again, the option of 1 piece wings and plug-in wings.

I will not charge out here and say that this airplane is going to change the way we fly and the world of F3A, but it should present a solid forward evolution in F3A airplanes. Like most airplanes of the current trend, this design pulls attributes from other airplanes that work well and combine them into a form that is pleasing to Christophe (and me also, as I find his designs to be very pleasing to the eye).

Mark