Personally, of the two, I prefer the fuschia one better than the white one. The white one is a bit too 'Little Bo Peep' for my liking. It looks like it should come with a shepherds crook and a lamb!
I don't know how (or if) it will affect your choice but I also think the pink one looks quite like the dress Madonna wore with long gloves in the 'Material Girl' video.
Whatever you choose to wear, I hope you have a great prom night!
I agree with Aprilis. The fuschia one is more grown up looking and less girly. If you want to go for the sophisticated look definitely go for the fuschia dress.
this one yet again is gorgeous, though personally i have to say that i prefer the white one!
although i do agree with the peoples comments above.. if you want a more grown up sophisticated look then probably best to go for this.. however at things like 'proms' then an awful lot of people end up wearing the same style of ball dress/gown and end up looking samey.. so with that in mind i would think the white one you will stand out more - but it depend whether you want to!
both lovely dresses though, but in my opinion i think the white! xx