From being on the boards as long as I have, I've seen the changes and conversations from v2 to now and Axiom has consistently made incremental changes to the speakers rather than full step changes from version to version. When the v3's were about to come out, it was commented that some of the final v2's were already getting the v3 woofers, but with black dust caps. The same thing happened when the v4's were coming out: the later v3's had the new v4 tweeter, but the v3 crossover - or something along those lines.
So while you may see differences between between speakers of the same version rest assured that you are still getting a high quality product that is a bargain for the sound quality you are getting.
