I have tried all three (Notice I said three).
Infra Scope
Thermo scope.
Infra with camera.
ATN scope runs 1k dollars.
Thermo scope runs 1k+ dollars.
the BIGGEST problem with BOTH of these scopes,
is night blindness. You are looking through a lens,
and your eyeball dilates to compensate for the intensity
of the light coming through the lens.
When you come off the scope, you are totally blind
in that one eye. It is (for me) a real pain in the rear.
Both of these scopes have their advantages. Both
have their disadvantages.
The IR scope works great for all kinds of situations,
but it is only REALLY good out to about 100 to 150
yards. Yes, you can go further with better IR light,
but past 100 to 150 yards is quite a shot for me.
The Thermo Scope is good to about the same
distance for a safe shot. You can actually go out
much further than 150 yards with Thermo, but then
the objects become so small that it is hard to aim.
You can identify objects that far with Thermo.
Thermo also is kinda funny on showing heat. Animals
with lots of fur do not show up as good. you see their
legs, head, and body parts without fur or less fur.
A Armadillo you can see easily for miles it seems like.
Coyote's will not show a full body at times, unless it is
a little closer than 150 yards.
The Third one....
The one I enjoy using.... It is about 1/5 to 1/10th the
price and cheaper, depending upon the night vision scope
you are looking at.
It attaches to your scope on your gun. There is no sighting
in, because it uses your scope on your gun. It is a IR scope
that uses a screen on the gun. The screen does not blind
you by making your eyes dilate. The screen is adjustable in
brightness. This setup is what i use most of all. the only
thing that you have to get use to, is aiming via a screen instead
of a scope or iron sight.