I don’t feel like I’ve drawn Asta and Shinra’s cocks super differently, personally, so I figured if Noelle would’ve had a preference, it’d be on an emotional level. I may not know much about Black Clover, but I know she’s got sort of a tsundere-style crush on Asta, so that gives him an edge in this competition. Sorry for zooming the image in enough that you can’t see the boys’ faces, but I think their skin tones are just different enough that people should be able to tell them apart. Just in case it’s not clear, though, Shinra is on the left side of the pic, while Asta is on the right.
Amazing detail on those heads, Near