I've got a lot more experience with the pre-BTR Cronus scopes than the Ares ETR, having shot a couple of season's worth of 22RF PR matches with Cronus scopes mounted on 40X & XB, as well as V-22 repeaters. But shooting from 600yds with the ETR on a custom 7-08 Improved 30* & a pre-BTR Cronus on a 6 Dasher on a dark, overcast day late this past summer, I was very impressed with the ETR's optical quality. Felt it was at least as good as the Cronus, in both brightness & resolution. Haven't shot with those two scopes together again since, so don't have an opinion as to how they compare in brighter, more normal conditions. Have yet to put the ETR through a tall target & box tracking test, but its click detents are definately more distinct than those of the Cronus. However, I prefer the Cronus' floating crosshair on movers, especially the pre-BTR's thicker, heavier crosshair. I normally dial back to 10x-12x for movers, and while the Cronus' crosshair remains pretty distinct at that magnification, the ETR's floating dot won't be seen at all.