Excellent advice!!! Also compare in low light.Swaro ELs and similar level optics can't be appreciated with a quick "look through."
They earn their keep when doing detailed glassing at distance and into/through brush. The increased detail that is available when glassing under trees for bedded animals or into timber from the opposite side of a canyon is simply amazing. That's where they shine. Until you see that first hand, you simply can't appreciate them really.
That said, all of the alpha glass manufacturers have a different feel when looking through them and your eyes will absolutely like one more than the rest. If you have the room on your credit card, order the Swaro, Zeiss, and Leica and return the two you don't want.