I am sure Imeo will let us know what the difference is but my
guess and it is no more than a guess at this point, is that the new steel connectors likely have a
thread like the Stealth caps does and would not be compatible with first run SS GGTS or first run UFS.
It is also a possibility that the window
threads are different. Recall Imeo listed that he was going to make the window
threads longer for better stability. I know this sounds a problem but like many have said, these are still desired just as much as the first run if not more so.
At any case, even if the new UFS has to be called UFSv2, it will still sell out just as fast. Any additional parts that have to be made can be made as say connector v1 or connector v2. There is a precedent for this already as for the name differences in the AVS and AFS feeder systems.
Just my musings that may have no importance but I again reiterate that I don't see this as a show stopper. It simply means the UFSv1 and UFSv2 parts are not interchangable. Just my 2 cents.