In soft pow, tough to beat the 5.1 2.4" with the stock motor, add some lower gearing while you're there, and you likely have it nailed. The camox 2.5 is a better all arounder, especially the 3" pitch 9175, better in setup snow and downhill, but you will definitely give up a little in soft deep pow against the 2.4.
You may know this already - there are two different camox 2.5's - a 2.86 pitch 9105 (163) with the sawtooth paddles, and a 3.0 pitch 9175 with straight edge paddles. Obviously, the 9175 requires a driver change from stock. Buying used, choose wisely.