Rift, simply because the touch controllers on the rift are way, way better than the Vive wands. More ergonomic and support for partial finger tracking.
They're also much more robust and run off standard AA batteries, which last for weeks (rechargables can be used).
It's really like the Vive wands represent tools in VR, but the Touch controllers represent your hands in VR. It has to be experienced to be believed.