You can't go wrong with either scope.
The Zeiss should be a little brighter in very low light, using a little better glass/coatings, for my eye anyway.
One thing I have noticed is, we can have 5 different people looking through the same optics, and we'll get 5 different opinions as to which is 'best'.
Look through both, and let your eyes decide on the glass. Mechanically, both should be comparable.
Years ago, I looked through my son's Assembled in USA Zeiss Conquest (about $400 back then), a 3x9x40, and then looked though my buddies Swarovski Z3, 4x12x50, (about $900), and was surprised to see the Zeiss had better color rendition than the Swaro. The yellow flowers next to the targets were bright yellow through the Zeiss, but appeared washed out through the Swaro. Same thing with the orange target stickers, the Zeiss was noticeably better with colors.
My buddy did not see it the same way, and said his Swaro's looked better.