I would go with neither and opt for a 4.5x14 VX3 instead. In my opinion it represents one of the best scopes available in the VX3 line up (except the old 1.5x6 that Leo no longer makes). I find the length of tune between the front and middle,turret adjustments, and the rear ocular is quite short on both the 2.5, and 3.5 x variable models. This can result in using extensions on some action lengths. I have owned several 3.5x10 VX3's and to my eyes the spherical aberration is quite pronounced on this particular model, it is much less pronounced on the 2.5x8 VX3's and barely noticeable on the 4.5x14 model. Also, the eye relief is outstanding on the 4.5x14, last but not least, I find it to be really beneficial to crank up the scope to 14x when at the range or holding(with a rest of course) on the vitals of my target at 300+ yards.