I think the Champagne dress is the nicest of the two and I love the sound of the accessories; but personally, I don't think it'd be great for clubbing.
I'd never dare wear something so sleek and clean to go clubbing. Most places have UV lights, so you'd be glowing all night, and you're bound to bump into someone and have a drink spilt on you - I mean, it's not definitely going to happen; but the times I've gone out in anything white more often than not someone bumps into me and I'm left with beer stains on it all night.
To me, the black on speaks clubbing more - the champagne dress is really cute and more sensual; but I'd wear the black one for that occasion.
the one with champagne coloured dress will look beautiful on anybody go for it...
black. its slimming. plus I wanna be the odd one out and go against what everyone else says. however make sure you wear lighter accessories so it doesn't make you look completely goth like. lol. by the way. bad idea to try to attract a guy you like at a club... just saying