By all accounts the UCR should be lighter as it requires less cordage for same adjustable length. We are talking grams here, as the bury lengths are much different between the two. Also some feel the minimal usable range is better with whoopies, so keep that in mind (ie.. how close the tree's can be before you run into a problem).

I recently (few months ago) did the switch to UCR's following Sgt Rocks video, mind you I made them to my specs, so they were a little bit heavier than his are but I truly like them better than whoopies, and I have been using whoopies for years.