I have both scopes in question... I voted for Kahles. Only for a couple reasons. The Zeiss LRP S3 is a hell of a lot of scope for the money, and had you just simply asked about the Zeiss, I would have told you to buy it, and it's a great scope...Because it is.
That said, I prefer the Kahles SKMR4 reticle over the Zeiss ZF-MRi reticle. The Kahles reticle is slightly thinner, the Kahles has some of the best turrets on the market (it also has a red post that pops up when you move into your second rev for an indicator), the Kahles has Austrian SCHOTT glass, and the parallax location on the base of the elevation turret is phenomenal. Once you get used to it, there's really no going back. Because it's on the elevation turret, it also makes the scope very thin in width from left to right.
