Depends on what and how far you are going to range. Last week in Wyoming we had all 3 of the newest modles side by side. Swaro, Leica, and zeiss. We were ranging a tree mid day, partly overcast. Range was something like 1150 yards. Swaro was reading once out of every 3 or 4 tries. Leica was hitting it every time. Both Swaro and Leica was getting with in one yard of each other and the Zeiss was reading 100 yards less. This was not a great test and by no means draws any form of a conclusion. But I own both a Leica and a Swaro and for me, I have a hard time deciding which one I like best.
I tested the two I own ( Swaro & Leica) on brown cows in bright sun once and the Swaro ranged furthest. But the Leica is smaller, easier to carry and way, way faster.
At this point my advice would be, get a Leica and a Swaro OUTSIDE and test them your self. They are both good units. One more note, if you care about warranty repairs. I have owned many swaro products and I have had 2 rangefinders, and a pair of bino's repaired. FAST, Frendly impecable service at no cost!! I have never sent in a Leica for repair so I can't coment on their repair service.
Thats all I know today..