What happens if I run my Vive Pro while the Mixed Reality portal is on ?
The universe explodes. Then nothing else happens because it doesn’t support vive. At most, you’ll get an error about an unsupported headset.
Yes and yes, for full-vr/immersive mode. The headset doesn’t control the game camera in cinema mode, so you’re still mouse aiming there.
WMR compatability is fine. You have to start the Mixed Reality Portal (the vr software) before starting a game or there’s a pretty good chance the game won’t render to the headset, which causes bad language every now and then when you forget, but it’s nothing major. Generally speaking, if I start MRP, then SteamVR, then the game I don’t have issues.
The portal has some annoying QoL features, but nothing that breaks games. The biggest issue I have with it is that it will randomly start itself while doing other stuff, so it’s probably better to not leave the headset plugged in all the time (probably a good idea regardless, unless you spend a lot of time in vr).
The different versions are about what you get with the game, dlc, soundtrack, stuff like that. They’re all the same game, so it doesn’t matter in terms of what vorpx can use. I can’t speak to the quality of the games as I’ve never played either of them.