Quick Question: FatShark Teleporter v4 VS v5?

Montiey

Master Tinkerer
I'm being curious today and poking around, seeing just how cheaply I could get a starter set of FPV equipment. I found offers for Teleporter v4 goggles, and the Teleporter v5. What's the difference? As far as I can tell, FatShark just gave the v4s to horizon, and then released an identical goggle under the v5 name. They have the same resolution, but what about the VRX, and the video inputs? None of the info on Horizon's nor Fatshark's site covers all the details well.

Thanks!
P.S. I'd be more than happy to buy an old pair of goggles from you. Make me an offer! :3