There are essentially three types of weights. There are std sole weights, deep sole weights (essentially go deeper and are taller usually found on fastbacks etc...) and lastly sole plates (Kombi S, Futura original had a rear horseshoe weight but similar to sole plates, etc...)

Most common found are the traditional sole weights which is usually found on the X5 weights.

There are different types of cosmetic finishes such as CT, engravings from custom shop, CT Deluxe, etc... however they do not affect fit or installation.