LAST EDITED ON Aug-21-10 AT 02:16AM (MST)[p]Bucktaxi- I own the Zeiss 15X60. Yes I have compared them SxS extensively. In general there are three areas in which the Swaro's and Zeiss differ(besides porro vs. roof prism). One, the Swaro have a slightly more true color. Two, the Swaro's are lighter. Three, the Swaros are smaller. However, the Zeiss have a slight edge in field of view, and contrast(depth perception b/c of porro prism), and stronger or more true 15X and a better 4mm exit pupil. I willingly admit that I would rather pack the Swaro's day in and day out but have absolutely no problem saying that I love my Zeiss and have no intention switching anytime soon. In fact, my next purchase will be the smaller, lighter, bettter F.O.V Leica 12X50 Ultravids. Yes, I have compared all 3 SxS in the field. One thing to remember is that the older porro prism style of glass is more efficient at transmitting light than the roof prism. The Swaro's glass and coatings are state of the art and that affords them to be in a smaller package even though roof prism are less efficient only by design. All in all the Zeiss can be had for a great value these days and will always make the list. I can tell you that my hunting partners have all agreed on these findings when doing SxS comparisons. I think they have all asked to buy or trade straight up for them. You know what answer was. NO. One other thing to point out. For those of you that can't see around a blade of grass(Thx Terry)or are often confused for a cyclops because your eyes are so close together you might consider the Zeiss or Vortex Kaibabs. The Swaro's just won't close down far enough for some. IMO CDN