Hello, new to the site. My name is Tony i manage a sporting goods store in farmington,nm. The comparison battle between the Vortex Kaibabs and the Swaro 15 x 56 is a hair splitter. I've sold both and compared the two in the field. I didn't use the Vortex chart but after reading some reviews here, I will definately do that. In low light the Swaro seemed to be a touch brighter and the field of view was better but not by much. The Kaibabs clearity on on picking up on muleys in the sage brush was phenomanal. All the customers that have bought either of these optics and compared them have basically said the same things. When it comes down to it, if you've got the cash and you want the very best glass on the market theres no doubt Swarovski is it. If you're like me and don't make the big bucks, the Vortex Kaibabs are the way to go. Both companies have great customer service, however Vortex is superior. There warranty can't be beat and their customer service is excellent. My vote on which optic to own goes to Vortex. The quality, warranty, and price are the deciding factors for me.