I am only reiterating what others have said, but I can now comment on this thread as I now have owned both. Yes, the IQ is noticeably better v2 vs v1. This is definitely noticeable with a 1.4xTC. I did not care for the IQ with 1.4x TC on the V1 model whereas with the V2 model it is actually very good. Actually, thinking about it, the V2 +1.4TC is as good or better as the V1 model without a TC.

So, a solid improvement, IMO.