I plan to release the same game on the two hardwares, is it mandatory to setup everything twice as i'd really like to have only one universal leaderboard ?
I believe you have to setup one app for Gear and second for Rift. But you can always code some leaderboard functionality yourself and do not use the one, that comes with Oculus (or you can use them in parallel). The thing is, do you believe the experience is identical on both headsets, so the scores are comparable?
Yes the game is the same (aside from better visual obviously), so it would make sense in my opinion to be able to have the option to share these data across different hardware using the Oculus Platform api. So if i understand there is no synced game data at all across different Oculus hardwares ?