Both use a square gate, but they have different sticks--Hori uses a Hayabusa, Mad Catz uses a Sanwa JLF. Both are good sticks. Mad Catz uses Sanwa buttons as well, while Hori uses their own Kuro buttons. Opinions on the Kuros are mixed, while Sanwas are generally praised. Hori also has a touchpad on the Kai, which the TE2 lacks.
Hopefully that bit of info helps you out.
Yes that helps out, thank you very much. I've owned a few different Mad Catz fight sticks before and still use one today but with all these delays and how hard it is to get a new one for PS4 currently, I might have to make the switch over to the Kai.