Vanilla is an untapped morph. While enchi and vanilla are rather newish, more combos are made with enchi since people saw what it can do from the beginning they started making combos. Vanilla has only really seen its amazing capabilities with fire combos. Once vanilla creams came out, vanillas were sought after more and also experimented. So there hasn't been much seen by these. I have two females and can't wait to do the typical fire combos, but also put it to other untested morphs and maybe get surprised.
You have to look at what each morph can do and based on those combos, decide what you like best. Either way it's a good choice.