I asked the fabulous CarrieAnn how sparkly her Tantus Vamp was and she said that it wasn't nearly as sparkly as the Leo is. "Tiny sparkle in a pearly shimmer, more than glitter", was her exact reply. I would also imagine that each batch is a little bit different than the last, so one may sparkle more than the other.
I have the Vamp, and the glitter elements are tiny minuscule. The glitter looks slightly/faintly shimmery. It's true you can't really see patterns like you'll see on the Leo. I think they didn't want it to bling-bling glitter, and still make it appear as if it was Twilight-vampire realistic, without being sparkly like in the movies.