Main difference for me, after hopping off 12m Rebel 2013, is upwind ability....no doubt the Rebel benefited from the extra horsepower of 12m vs 11m but no way would the EVO point as high....for me anyway...perhaps its my technique too
The difference in upwind performance is bigger in lower end of the kites. Rebel goes upwind even you are barely planing. Evo needs to have solid pull and bit more speed to go upwind. In smaller sizes and stronger winds the difference is smaller but still Rebel is the upwind master of these two kites.