Its not as detailed as the model pic, but those model pics are original designer gowns usually, and they can't get them exact, most get them almost and it looks almost the same in the pics you've provided - just the flowers and beading isn't as detailed.
I think once you have the dress on it will look beautiful. If you want some more bling, get some sparkly jewellery to add to your look maybe.
Are you so unhappy that you don't want to wear it now? Depending how far away your wedding is, perhaps another dress from a shop?