Seed bby, all the way. <3
I've always loved seed bby more since the moment I saw it. Monmen is cute but nowhere near as cute as Churine and absolutely outclassed by it's evo, and in that same breath, Erufuun just cannot beat Doreida.
But! Since we are talking about pre-evos, definitely Churine. Prettier and cuter to me. ^^