I agree on the Vive being better if you want it all and got room for proper room scale. I got access to both and what I miss on the Vive is the comfort, polish and simplicity of the Rift. It may make the Rift the over all better package when Touch is released.
But for now a developer should definitely get a Vive, unless you got a specific reason to choose the Rift.
(The Rift was not made for sitting down, that changed a long time ago. Even some Oculus made experiences explicitly instructs you to stand up.)