sightron big sky vs vortex viper

[da new guy]

I am in the market for a BDC reticle scope and I am considering the two above..Vortex Viper andthe Sightron Big Sky. I know that both basically have an unconditional transferable warranty but does anyone who has looked through both have a preferance? And if so..why?

thanks in advance..

[bugsNbows]

I prefer the Big Sky with the HHR. Both are quite good, but the Sightron has the climate control coating like the Bushnell Rainguard.