Difference between unlisted iPhone 5s models?

Apple only officially lists a handful of iPhone 5s models, and yet there are in fact many more. Are there any differences between all these models for different carriers when they're using the type of same network? Specifically, I'm interested in whether an unlocked ME311LL is functionally equivalent to the ME329LL or A1533 GSM model (i.e., does it support the same LTE bands?).