That is exactly what I have considered.
My thought is that I have a sportbike, shod in the best rubber for the heroics, my CR is for fun.
Also, the new TT is a radial with W rated compound, this is completely modern construction.
The only element of the tire that is classic or retro is the bitchin' TT100 tread pattern
On the plus side, the aggressive tread pattern will provide superior wet grip.
The tread pattern eliminates some if the rubber normally present on a semi-slick superbike tyre, which should mean that the tire will simply not last as many miles before requiring replacement.
I'm OK with all of that.