@marcel yeah, we are porting our game to all 3.
PSVR is the lightest and most comfortable, but it's design can lead to light leaking in on the sides in my experience (it mostly sits on your head rather than strapped to it, which feels great).
The Vive is probably the bulkiest of the three but isn't an issue when you get down to it. I'm not a massive fan of the exposed cables. It's setup is also the most complex what with the base stations being mounted and all (you don't HAVE to mount the base stations, but if you do its way more fool proof, i watched Kotaku complain about tracking issues and the guy had his base stations on what looked like a stack of shakey books. sigh). Nothing beats roomscale. holy shit, its incredible actually walking around the world with fully tracked hands. Its insanely intuitive versus a gamepad. Anyone can do it, coz its just you and the world basically.
Oculus wrongly gambled on roomscale not being as popular as it is, so I think its gonna take a few tweaks and things like Touch to get it on par (though you wont get full roomscale even then, will be 180 degree tracking, same with PSVR versus vive 360). Personally, as a consumer I'm also not too hyped about the Oculus store, I'm a firm believer in opposing exclusivity in any shape or form. But time will tell how that works out.
Performance wise rift and vive are almost identical (assuming your rig is up to it, i believe a 970 is targeted as minspec), while the PSVR is a slightly lower fidelity, but thats understandable and honestly the beautiful thing about VR is once you're in, as long as the world is consistent you will get fully immersed in ANY level of graphical fidelity (just look at minecraft or modbox all the way to more graphically intensive stuff like our game, the Gallery, or Vanishing Realms etc).
Also, there's a lot of misconceptions you HAVE to have a large space for Vive or roomscale. Thats just not true. It's scalable, from sitting still to 15ft x 15ft. As we ported to vive first i'm most familiar with that one, but as i learn more about the others i'll update you. We have them all at the office, as well as that omni treadmill and older stuff like razer hydra and so on. So much fun with all this tech