Re: which of the two scopes
Interestingly, I have them both as well but my Leupy is the AO target model with high turrets and more high end magnification.
If it's a bench scenario, the AO is fine (thats what my Leupy is doing duty as, as a bench scope). The AO is a PITA to crank in the field whereas the side focus/parallelax is a much more convienient setup for in the field.
BTW, the Vortex Viper(s) I have appear to me to be just as good in light gathering and image quality as the Leupy VX3 and the Mark 4 LRT.
I say 'appear to me' because to others that may or may not be the case.....