Max, IMO there are only 2, maybe 3 if you count the Razer OSVR, which has a number of issues right now with in cockpit games. The Vive and the Rift especially are the only 2 serious units available right now. The Vive is great for stand up cocktail/look wife this is cool/etc sort of games, the Rift is by far superior for in cockpit games. This includes driving games. The Vive CAN work with some sims, but in every single one I've tried, which is all of the VR compatible flight and space sims, the Rift is superior. It's also less expensive. TBH I wouldn't have bought the Vive had I a chance to compare it to the Rift, but it was available in my area first so I bought Vives before the Rifts. There is one single game I play that I keep the Vives for, and about a dozen I use the Rift for regularly. AH3 also has the best VR flight experience out there right now.