i bought thermal first. I bought a ir-reap. I like it so much that i own 2 of them now. I got tired of scanning with one, then mounting it on the gun when i wanted to shoot. My arms got tired of holding the gun up to scan thru the scope on the gun real fast!
Now, being an older wiser person,,,I sit on my back porch behind camo netting watching the woods behind the house. I can also turn around and watch tv thru the patio doors if i want,,
My house has woods on 3 sides, so animals are used to me and do not seem to mind that the house is there. I have NV, but only use it to walk around with. I have, on more then one occasion,,been looking thru the NV and saw nothing,,then was surprised when looking thru the thermal that there were deer standing there looking at me in the dark of the woods. When I go back and forth from NV to the thermal, the NV could not see the deer, but I could see them perfectly thru the thermal. Animals are still camoflauged thru NV.
I would pick thermal over night vision every time if given only 1 of them. I will say though, if you go with a lesser thermal, it is not near as much fun. The reap-ir has ruined me for other thermals. The down side is it is harder to walk with, but i do it sometimes,,and it eats expensive batteries quickly.
I still like my night vision and plan on flying my ultralight wearing them at night this summer just for fun. The NV does have uses for hunting with a laser,,,, but not much can hide from good thermal.