I have tried all 3 of the versions you posted
Results:
XTU 6.1.2.11 benchmark scores 1109, runs really well completes pretty quick
XTU 6.2.0.10 benchmark scores 1026, runs very poorly slugish takes 4 times longer to complete, core voltage very erratic core count erratic too
XTU 6.2.0.14 benchmark scores 1021, same problem as ver 6.2.0.10
I've loaded ver 6.1.2.11 and that's very good so I will be sticking with that, hope this helps, if you need anymore info on my setup, overclock settings in bios just ask
Regards
joe