The weight is a big improvement, we weighed the vests side by side and the final rise is over 1lb lighter than the wings works. 1lb may not sound like much but when you're wearing it for as long as we do some days it all adds up. Other improvements are the vented back, as the wings works isn't vented. The molle system on the final rise is also a nice improvement as you can add different components to it, where the wings works is setup how you buy it and that's it. Like I said the final rise was based on the wings works so they are very similar vests, just a couple of improvements made the vest that much better and even more of a joy to wear out in the field.