When I take my IR Hunter Mark II and Zeus Pro, side by side, the IR Hunter looks much better in my opinion. They operate two different ways. The Zeus makes hot objects stand out more with definition of that object, the IR Hunter shows a better separation of temperatures between objects, therfore it defines all surroundings far better. That is good because I can still see trees, grass/brush, fence lines, rocks, etc, hot objects like a hog, deer or person, still show up incredibly well.
However, with this latest firmware change to my Pro, I'll have to say, I really like the changes to my Zeus Pro. It's not like the original firmware we used a couple years ago, it's better because now FLIR/Armasight found a balance between making objects standout that are of interest and get getting good detail of the surroundings.
I sent my Pro in this time for several reasons. First was the halo issue. This, at times, made my scope totally unusable. When there was a higher humidity teamed with a certain dew point, I had to NUC every 30 seconds to see again. Apparently Armasight now has a fix, they modified mine, I haven't seen the halo yet but will test further next week.
Next, all my Enhancement menu items would change, but had no effect looking through the scope, that now works again.
I had another problem when pointing the scope up, it would restart. This appears to be fixed also.
And lastly, I could get no better than 2" high at 100 yards with the boresight. Now granted, this could be the gun mount and not scope, not all are created equal, but I could zero my IR Hunter with no problems on the same gun.
There are Pro's and cons to each. Best to decide what your main goals and needs are, test them both and go from there. I'm fortunate enough to own both.
I should be getting some hunting videos soon with the new Armasight firmware.