Hard to go wrong with Swarovski if you have the stomach to lay down the $$$$.
I have way too many optics. I just ran though the manufacturers leopold, nikon, leica, meoptic, fujinon, and swarovski (along with several low end optics, tasco, bushnell, etc).
Zeiss are undoubtedly top end optics and I don't know that much about vortex except they seem to have a great guarantee.
I don't own Zeiss binos but I once had a guy standing beside me with a pair of brand new ones comparable to my 15 year old slcs.
He asked to look though mine and by the end of our comparison he said he was taking them back to Cabelas to swap for swaros.
I have the swaro spotting scope you are looking at. I used to own a Nikon and literally gave it away after I got my angled Swarovski.
One of the best purchases I have made.
I just picked up a Swaro SLC 15X56wb which was discontinued. It is heavy but the optics are exceptional. If you can still find one of the discontinued ones you might be able to save about 30-40%. I don't think that would get you down to the Vortex price but 40% off is huge.
I know you would be happy with the swarovski spotter.