No word on the price, but my guess is it won't be more than $50 between the two models, much like the Hyper7 and the 9.5.
Driveline differences: one is belt (and depending on RTR or Pro, the belt is on the other side!) one is shaft (with the CD3 putting the engine on the other side...). There was a video of Ofna's booth at RCX where they showed their new models. Gotta find it. Looks like they're gonna package some starter boxes with some of their kits, much like the Hyper7. If they have a box with the CD3 Pro, it's a wrap for me...