Is AFV Club using the Miniart molds for their Valentines?
...they are not the same molds. Take a look at Terry Ashley's comparison review on Perth. It would seem AFV Club's version is a bit more accurate for some of the shapes on the engine decking, as well as wheel size.
That's not to say the Miniart version isn't a nice kit; it is, as I've built their MKIV. Currently, it's the only game in town for the 3 man turreted version.