There might be a difference with the thumb. It's difficult to say, but looking at side by side pics, there appears to be thicker foam and the wrist strap is obviously different. Some comments said the hand compartment is bigger, but can't tell from looking at them. There does appear to be more room for fingers at the end. It's just odd there are several things different in the gloves, so not really "minor change".Ohh I thought it was a change to the strap they attached the thumb with. My bad.
Here's the thread with the side by side pics of both gloves:
https://forums.sherdog.com/threads/where-to-pick-up-old-style-fairtex-bgv9s.2832071/