Personally the standard duplex Leupold uses I find to be very thin for my biggame hunting needs, especially in quick acquire or low light situations. I am not that old and have excellent vision but really like a reticle when I bring it up the crosshairs jump out at me, as such I prefer the heavy in Leupold. The heavier duplex has never caused me any problems on those longer range shots either.

Like trailer said best to judge for yourself.