I have two Ribz packs, the original version and newer 'improved' version. It's a good piece of gear, but for my purposes the KB is better. Actually you could probably wear them together depending on how you adjusted them. The KB is optimized for carrying a sidearm but if you don't need to do so you could get a pretty good amount of stuff in it. It's very easy to get at everything; that's a key virtue of the pack.