I have had over a dozen ranfinders. The first four or five were Bushnell, then two Lieca, at least three Nikons, a Swarovski, and now my third Sig and a Vortex Razor 4000. I Sent my Sig 2200 in because it was failing. They sent back a Sig Kilo5K. Of all the rangefinders the Swarovski still is so good I can leave my binos behind, but it's old and has no angle compensation. The new Kilo 5K are ballistic capable and that's nice, but it doesn't want to take a new reading in a timely manner. Take a reading and a coyote is going to be a real quarter mile further before it wants to read again. It's supposedly a 5000 yard rangefinder, but off white steel grain bins my furthest yardage has been 3800 yards. The field of view isn't great. The Vortex are a supposed 4000 yards and off the same white grain bins I have ranged 4100 yards. Both range trees at about 2600 yards. The Vortex optics are not as good as the Swarovski, but they beat everything else that I have looked through including all of the Leupolds.
Snow will affect all of the rangefinders. They use invisible infrared light. The dumbest thing is they used it for underwater cameras for fishing. Out of water they were good to 50ft, but infrared doesn't penatrate more than 3 ft of water and it will not penetrate glass. Turn on your light you use with night vision and try look through your house windows. Now your asking what does that have to do with snow and rangefinders. We think snow is white, but it's actually clear, but it's structure reflects as white. Many rangefinders will shoot through glass, some will not. Some will shoot up to 400 yards through glass. A rangefinder that shoots through glass will also penetrate a short distance into snow rather than reflect back to you leaving you little capability in a snowy landscape. Rangefinders work great off hard surface white, but not snow. On a snowy hillside my Vortex will do 1200 yards, but on a flat surface snow I'm limited to 400 yards. Put a coyote on that flat surface snow and the farthest I have had a chance to check it was just a few yards over 1000, so I dont know it's limits.