I have the XR and the regular SEEK, and I agree that for wildfire applications the larger field of view is better. It also wins for applications such as diagnosing electronic circuits and building issues. The XR works better for outdoor detection of smaller objects at distance, such as for search and rescue use or, presumably, hunting.
Ah - so you are saying that DTI can also improve optical isolation if done with materials of suitable refractive index. That's elegant if it works. From the wording I still don't think the author of the article understood the distinction though - it's not diffusion in the case of photons.