Whats the max range you are thinking for this scope? I know vortex is good so thats why im feeling comforantle with this one.

Also whats the difference between the one i posted and https://www.amazon.com/Vortex-Optics-Diamondback-Tactical-Riflescopes/dp/B01MR4F4QK/ref=sr_1_5?crid=3DGUK1D94PVLG&keywords=vortex+optics+diamondback+4-12x40&qid=1555300757&s=sporting-goods&sprefix=Vortex+Optics+Diamondback+4%2Csporting%2C167&sr=1-5 ?