Dyneema is what all synthetic winch ropes are made from. Just different brands/ blends / coatings. UV fade and abrasion weakens the rope and some manufacturers have coatings to help these things. If you do some research you'll find the differences between brands, warn uses dyneema and some magic high molecular crap, amsteel is 100% pure dyneema. Ebay brand Tuff Stuff is like 80% dyneema etc. If you wash it after you get it gross and keep a cover over your winch they'll all last, even though even warn's site suggest replacing the rope every year.