I have observed the Yak 55 to have a more boxy design, so it is older.

So, from an aerobatic / 3D point of view, which one is better? Case in point, I have the PilotRC Yak 54 73" 30cc, AeroWorks Yak 54 90-120 with a 20cc or 30cc and a GoldWing / ArfMfg (Slipstream / TBM / whatever) Yak 55 30cc to choose from. Wnat it to do a but of pattern as well as 3D