I'd be curious about what you mean by software experience. Presumably oculus home gets replaced, but is the performance of things like tracking noticably different?
Tracking-wise, there isn't a lot of difference. Certainly not enough to warrant giving all your data to Facebook.
The Quest stands out because the tracking is as accurate and consistent as on desktop class VR headsets. The software and user experience is a clear notch above any other standalone headset.
[0] https://www.scribd.com/document/399594551/2015-06-22-MARK-S-...
I think it might already be too late in terms of dominating.