I'd put them as very close competitors. Similar resolution, but the XTR III has (much) better turrets and FOV. I do not like CA, and the XTR III has it, as does the XRS II. I think both have narrow eye boxes in the upper mag range, but at mid level (10-15x) they are very decent. Not as generous as a Schmidt or ZCO, which are ridiculously good, but solid compared to other scopes in the same or less price range. Reticle wise, I think the Burris' SCR or SCR 2 is a better competition reticle than the G3 or H59. (.2 mil holds and a less cluttered tree are an advantage to me) I don't think either one is a bad choice. I picked the XTR III for a production class rifle, for me it edges out the XRS II where it counts for competition. And FWIW, I run Schmidts on all of my other rifles, and I don't think the XTR III would put me at much of a disadvantage.