Regarding your first point, I think that would make it too easy. Part of the challenge is figuring out what the differences are. I love your second idea though

Regarding your first point, I think that would make it too easy. Part of the challenge is figuring out what the differences are. I love your second idea though! Someone should make this if it doesn't already exist. Although if it's not gamified, what's the incentive for people voting between two designs?