The style matters (has to use effective technique and tactics), but the training methods and the person in the fight matter more. There's some overlap between training and style, though. How you train is part of delivering tactics and even strategy, so changing the training methods can alter the way the style operates. If boxing were trained entirely on a heavy bag, it would quickly lose the footwork and head movement that are part of the style. Is it still boxing then, or is it something derived from boxing? That's a question whose answer depends how we define the style. The same would be true of WC. If a different kind of movement training were incorporated (that didn't mess up the mechanics of power delivery, etc.), WC might look quite different - is that still WC? If forms weren't used to train the movements, but they were trained to the same end, is that still WC (I saw at least one person state recently it's not WC without the forms)?