About time, I have been waiting for someone to start this debate
I have not flown one of the newer generation 260's. I say newer because they are lighter with bigger control surfaces, compared to the 260's we were flying 15 years ago.
I flew for years a Pirate 260 and it ROCKED
All the control surfaces were too small and it just was a brick compared to todays standards for aggresive 3D flight.
I'm going to guess the 260 may win this one and if you look at the Yaks its very similar to the 260 set up.
BTW, My 3D bird of choice at the moment, CHP Vision, which looks alot like a 260.