The only time I can tell a difference is early in very low light or in protracted shooting sessions. My better scopes don't seem to induce eye strain or fatigue after sitting at the bench for a few hours.
Is that why we pay a little extra for better glass Paul? All the rest is blister pack Bushnell capable.
What kind of glass you think you need probably depends a lot on where you hunt, how you hunt and what the hunting regulations are. For instance you aren't going to shoot any in the dark here legally as hunting hours are sunrise to sunset.
