It's a hard choice.. Personally I think I like them both equally! They match perfect with everything and they are both classy and elegant LV's symbols.
i do have a mono in the papillon but i don't use it anymore. I want to sell it but my mom insists i keep it coz it's my collection...i guess i would have to buy either the speedy 35 in mono or the mono sac plat for chirstmas =)