So I was thinking about this since Amnesia was licensed. In my opinion, otomeges do have a higher chance of success.
First, because most girls like more romance than most guys.
Second, because most of the character archetypes from otomeges are attractive to Western girls even if they aren't anime/manga fans, but the same doesn't apply to Western boys. For example, usually western guys aren't attracted to lolis, but there are lots of western girls who like shotas.