They are essentially the same thing, but there were multiple hinge designs, per the designer Jeff Scherb. I would hold out for extreme terrain to get new inventory and then jump on that price, with the forum discount and free shipping you are saving a $100 over buying from their other vendors. I bought mine from Extreme Terrain and will confirm which hinge I have when I get home. I also have a gr8tops hardtop and still chose to purchase from Extreme Terrain.
https://expeditionportal.com/forum/threads/overland-lj.147941/page-3
You can get the new design Exogate (with the wide-swing hinges) now from MORyde (
http://www.morryde.com/products/190...-accessories?filter%5B%5D=all&filter%5B%5D=15), but it's also in the hands of some retailers like Gr8Tops:
http://gr8tops.com/shop/jeepmodels/wrangler-lj-2/tj-lj-exogate. The wide-swing hinges are also direct replacements for the factory hinges even without an Exogate, and those are available directly from MORryde (
http://www.morryde.com/products/189...-accessories?filter%5B%5D=all&filter%5B%5D=15).
Gr8Tops doesn't list the Rotopax carrier or the other accessories like the HiLift carrier (yet), but those are also available from MORryde, MORryde sent me a production version to test and I just got around to installing it on Saturday