I think Brian has done a better job than Evan in choosing music that plays to his strengths and that he can relate to, whereas Evan picks warhorses the audience already knows - which is helpful to him, I guess. Also, although it doesn't always come through in competition, Brian has had some lovely gala programs that have displayed a more musical side to his skating.
I agree that the audience is often responding more to the intensity and excitement - although it has to be said, those aren't necessarily easy to generate. I do not agree that Evan has more creative programs, than, well, anyone. He has programs designed to play the CoP numbers game, which is the least creative thing I can think of; it is possible to have a CoP-friendly program that is still creative (some of Dai's and Jeremy's programs, for instance).