Obviously the arrangement does matter, but also production-wise. I think it has to sound "big" and attention-catching for radio to "like it". Regarding hip hop production, I noticed Wu Tang Clang do not have that "big" production sound (more low fi, intentionally I suppose) compared to the P. Diddy hip hop artists that were able to cross over to the pop charts (Maze, Biggie, etc.) and the Criss Cross stuff, etc.