I believe that Harry Styles is cuter than Madison Perrin. Madison Perrin won the 2014 look alike contest for looking like Harry Styles, and many people on Instagram say he is cuter. Although I am a huge fan of Madison Perrin, I think that Harry had the original look, making him cuter.
Hope I don't disappoint you too much, this isn't gonna be much of a debate at all (it's more of an opinion to begin with, anyway). You can always re-post it though!
I don't even know who Madison Perrin is, just looked him up now. Don't know much about Harry Styles either, but I know what he looks like. The other guy is cuter I guess, nicer eyes, and more of an expressive face, I'd say. Neither of them do anything for me though!