To a certain extent, this is just another variation on the "NV or thermal" question, you've just named specific devices--but you'll find a lot of information in previous discussions here about the relative merits and drawbacks of the two technologies, and which applies best to specific use cases.

BLUF is that NV gives you "superhuman vision," but it's still vision, it allows you to see in conditions that others without NV can't, and it gives all the natural advantages and disadvantages that come along with that.

Thermal gives you a "new" sense, the ability to sense an input that you otherwise would not have access to, the fact that this "new sense" is interpreted through a visual output because that's the easiest way for your brain to process it is incidental, it is not "vision" per se.

What you need to consider is what exactly it is that you're doing, and whether you need to "see" things that you normally wouldn't be able to see, day or night, or whether you're doing activities that require you to be able to see "normally."

For example, if you're doing a lot of movement you probably want NV over thermal, as we tend to rely on our vision for input while moving. On the other hand, if you're going to spend the majority of your time in a static hide site, thermal might be the better option.

Another way to think about it is to think about different natural predators (and prey animals, for that matter) and their senses:

Active predators will usually have fairly acute vision, they're constantly moving around, "moving to contact" with their prey, and may have to pursue and chase down and subdue an active prey animal, predatory birds, "operating" in a three-dimensional environment tend to have excellent vision to match.

At the same time, an animal like a pit viper has "thermal capabilities," and tend to be ambush predators and lay in wait using cover and concealment and use their extra sensory perception to detect prey until the time is right to strike.

Both are effective predators, but their different hunting strategies are reflected in their different "sensors" and "equipment."

~Augee