I've been considering the Leupold VX-R 1.25-4 scope for my KAC SR-15. It looks like one model variation comes with capped 1/4 MOA turrets and the Firedot circle reticle. The other has exposed 1/10 mil turrets and the Firedot SPR reticle. Besides that (and $125 difference) are there any other differences I need to be aware of? Compelling reasons to go one way or the other?