The Magic and the Twist (and any other FunFly/3D airplane) is intended to fly slowly. Slower than your EZ Sport in fact. Speed is an airplane killer. Any airplane will flutter if flown fast enough, and that usually means self-destruction in the air. FunFly/3D airplanes have huge control surfaces and all the control travel they can get. They flutter at fairly slow speeds. Planes designed for higher speeds have small control surfaces and small control travel to resist flutter until they are going very, very fast.

If you want to go faster then the EZ Sport, get a nice clean 40 size sport plane, put a good ball-bearing 46 or 50 2 stroke in it and start out with an 11x6 prop. Then change to a 10x7 prop. If you still want more speed change to a 9x8 prop and stand back.

Any of the World Models low wing 40 size sport models (not scale, not 3D) would do, but make sure your control linkages are stiff and tight and don't use any EZ connectors.

Jim