Certainly will do
I was planning to do so anyway - mostly to look at the PCI-e 3.0 aspect. Frankly, I think that will make more difference than the clockspeed bump.
It's clear that, for single-GPU gaming at 1080p the extra bandwidth doesn't make a jot of difference (1-2% typically). But, for very large resolutions with several GPUs the difference can be quite significant (see
this thread for example). I'm very interested to see what the difference will be at 2560x1600, and also at 7680x1600, with the two different platforms.
Unfortunately there don't seem to be any Z87 motherboards that allow 16x/16x in PCI-e 3.0, so I'll be comparing 8x/8x PCI-e 2.0 on my current platform with the same at PCI-e 3.0 (effectively doubling bandwidth).