i'm contemplating NPs in black patent and wondering how comfortable they are...i dont normally do well with slingbacks since my heel is so narrow and the straps always fall down but i think the NPs look so sexy...any advice ?
Generally speaking, yes, the fit is the same, insole length/width-wise.
But if you have a really narrow heel (as is the case for me), you might be able to take 1/2 a size larger in your NP than in VP -- with VP I have to go for a tight/snug fit even if means my toes get curled up as otherwise there'll be major slippage at the heel; but with NP I can size up 1/2 a size from my VP size and enjoy the just-right insole length and the slingback helps alleviate some of the heel slippage problem.