Played singles today for 2 hrs. The toe fit is narrower than the zoom, and more importantly, the angle on the medial (inside) of the toe box is slightly more offline, forcing my big toe to bend inward at the metatarsophalangeal joint more than the ZZ, on hard stops, creating a hallus valgus (bunion like) feeling. I have pretty straight midline toes so I am a little sensitive. I was wearing a slightly thicker sock and playing in the day so my feet may have expanded as well, Seems this shoe is either going back to Nike or relegated to night play with thin socks. I think it would better fit those with moreton's toe type feet better.
Regarding breathability, I felt it was better breathing than the ZZ. I remember the Cage4 to be warm but not enough to compare with the GPT. It is not as good as the Vapor X Knit.
You can't go by that. The outsole design is quite different and you won't see the difference as clearly, especially the interior fit. It's not just the length, but how the toe box tapers and what your foot shape is. What I usually do is go to NDC and download their top view pics and superimpose them to see the toe shape, if my local Nike Town store doesn't have the shoe in stock. The pics are of the same shoe size, usually to the same scale and lens. Having black toe nails for the D1 years in sponsored shoes, I refuse to let the shoe dictate my foot comfort, no matter what it looks like and who wears it!