IMO, an AR implementation of visualization would be more interactive than a VR. Overall, great job.
1. Moving through the data set in room scale VR is completely different from seeing and manipulating a 2D projection of it on a screen. Exploration is much more intutive (just move your head!) and the perfect depth information that you perceive feels almost like an additional input channel to the brain.
2. Collaboratively analyzing visualized data with VR would require hacks that render abstract avatars of co-workers and remove a lot of the informational content of direct communication. With AR and a direct line of sight all of these obstructions just go away.