To answer the original question about how i feel about both tires, i have not tried the latter of the 2. But the Kelly Safari MSR is, in my mind, the best off road tire i have found for my jeep and what i use it for. This includes driving up abandoned logging trails and even off trail in full on Oregon country. This can get extremely muddy. I have never gotten stuck in the mud or snow either with this tire. A time i am more than happy to point out is when i was staying up on mt. Hood at Timberline lodge. It was constantly snowing for the full 4 days i stayed and by the time i went to move my jeep, 4 days in, it was completely snowed in. As in up to the doors and most the of car is not visible. All around me there are other SUVs with other tread of tires thinking they are safe just because they sport 4x4s in their rigs. The owners of these cars were actually paying people, who had snow shovels, to dig their "SUVs" out of the snow. In case you could not guess i got out in less then 3 min after i scraped all the ice off my windows for visibility. I rocked the car back and forth and was free almost effortlessly. As for ice, back in 2008 we had a really rough winter, i was driving everyone around because i was really one of the few cars able to move. My boss lived in a apartment complex at the top of a pretty steep hill, problem is halfway up the hill is a stop sign were most cars stop and loose it when they attempt to start again. The Kelly's got me moving without slipping one bit. A lengthy post but all from personal experience. As for the big question as to the life of the tire, i commute 40 miles every day, 20 up and 20 back. As of right now, i am low on tread, as in needing new tires low, but they lasted me all year. That may sound like an exaggeration, but i got the current set im on now last February, it's close enough to a year i think. Hope this helps, sure the Kellys cost more then the ladder of the 2 tires, but in my book, this is the only off-road tire i'll be buying form now on.