The 260 would be good all-around, but primarily because of the control surface size (check out the elevators and rudder) the 330 is probably going to make for better 3-D. Neither will disappoint - and both from Comp-Arf will need some work to increase the throws for 3-D, but nothing more than basic Dremel work - lots of threads about how-to. The 260 , with the wings and elevators close to the thrust-line will axial roll better. I believe that's primarily why it has the IMAC precision reputation that it does. I am not a good enough pilot to do anything more than fly my 260 (40% Comp-Arf) with the biggest $#!+ - eating grin you ever saw.

With triple rates I can fly with a pucker range from Sunday flyin' to Huckin' and puffin.
It's just about 6 in one and a half-dozen in the other, IMHO. I have a 30% 330 and had a 34% 330 to which I compare.