I've just tried Dirt Rally with my Rift and it works fine, so is there any difference in the original Steam game (which I have) and the Rally VR version available from Oculus?
FYI, I use the Steam version of DirtRally with the oculus rift and it works fine. Don't know if you get any extra features with the Oculus Home version.
The one from the Ocukous store is the same as whats on Steam i do believe. FYI , i use the Steam version of Dirt Rally with the Oculous Rift without any problems.