the expensive belt is an 1115 belt. It should last a very long time assuming the clutches are aligned. The cheaper belt is a 1122 and is also a very good belt. It will not last as long but should last longer than most belts did 5 years ago. An even cheaper belt is a 1080. While the dimensions are slightly different, it will work, and lots of people only use this belt. The 1080 belt will give you the best performance because it is a softer belt and grips harder. 1122 a little less, and the 1115 is the hardest, but will last the longest.
I use a 1115 as a main and a spare. But my sled is a 700 and has clutch work among other things. My sled puts alot of power to the ground, and I ride hard. So I feel the need for the strongest belt. Having said that, I also have over 3900 miles on the current belt, and no plans of changing it out.
I wouldnt have any problem putting a 1080 belt on a stock 600 trail sled. I have never ridden in the mountains or really deep fluff, but I imagine it would be harder on the belt. Alot of out west guys use extra venting to keep their belts cool. Heat is the main enemy of the belts.
I think I would just get the 1115, if your gonna be out west, and be done with it. You really dont know if the clutches are aligned right. None of the brands have very good tolerances when it comes to this. Hope this helps.
P.S. I always break in my belts, which includes washing them with soap and water, and running them fairly easy till the belt builds up some good heat. No WOT, and No barely using the throttle to get the sled moving. To easy of throttle slips the belt to much and is just as harmful as slapping on a belt and nailin it.
