I don't think the "new" MOD is as highly regarded as the "old" MOD. I don't have any experience with the newer versions, but the quality of the older ones is excellent. I wish I hadn't lost my Ayoob Razorback. That thing was sweet.
I could be wrong, but I think the "new" MODs are no longer called "MOD"- they're called "BLACKHAWK!"- or at least have "Blackhawk" in the name or on the box somewhere. That may be a clue to telling the difference between versions. And it seems like the price has dropped on some of the models. One has to assume the quality may drop along with the price.