Thought it was great until... - Vortex Diamondback 4-12x40 AO Rifle scopes

Well I have had my vortex diamondback 4-12x40 for 3 years it's always held zero and been good that way but it has always had a haze in low light. I recently bought a Nikon pro staff 7 4-16x42 I can't even tell you how disappointed I am in the vortex compaired with the Nikon it is night and day difference. The Nikon is ultra clear and amazing in low light and when you pull the rifle up its just perfect I pulled out the vortex to compair pulled it up and was blown away how hard it was to see through. I will no longer be spending my money on vortex. Granted the Nikon was around 200$ more but it is worth every penny. I have also had the cheaper nikons and I feel like they were also more clear. Hope this review helps at least go look through each then decide.