As somebody already mentioned above, the V12's are a mediocre summer tire at best. The RS-3s are a great track tire that also performs well on the street.
I would gladly drive the RS-3 on the street, but I wouldn't take the V12s to the track. Hope that answer's the OPs question.
There is a lot of talk about the Z2's and the G-Force Rivals. But as with the PSS, I'll reserve my judgment until I seem them out there at the auto-x/track. Talk is cheap, I like to see numbers.
The PSS was talked up like crazy, but I've yet to be beaten by them at an event
The Z1's were great. Hopefully the Z2 are even better - but again, I'll wait 'till I see it....
Meanwhile, RS-3 all the way!
PS: I kicked some serious butt at the last auto-x in the rain - on RS-3s....