I have a 4.5-14x44 Conquest and a 6500 2.5-16x42 ! They are very close optically "to me" .........even at last light ! The 6500 has tons of eye relief ! But the Conquest has a better reticule that stays black in all lighting whereas the 6500 will turn slivery in brighter light . I think the Conquest seems to have a wider fov on most powers as well.
I'd lean toward the Conquest if money did not really matter.............otherwise I would go towards the better deal $$ !! Say a Con. 4.5-14x44 mil-dot w/target turrets @ $950 vs a 6500 2.5-16x42 mil-dot w/factory adjustable turrets at $699...............I'd go with the 6500. But my Conquest is a model they were discontinuing last year and I got it from Chris for $599 !