The two binos are different. The vortex are much more like swaro SLC and the euro are much more like the Swaro EL. The difference is noticeable if you are able to take them out of a store to look around in an outside type environment.
The euro is excellent. You will be very happy with them. Jump on them fast, I got the exact last pair of the 15x56. The site showed "sold out" as soon as I completed my checkout (one week ago). They must be closing them out for some reason.