I can't make the comparison you need but i have a chrome metropolis. It's super tough and my stuff stays bone dry even in the heaviest rains. I don't use it too often since i have a rack/panniers now but sometimes I like to switch it up. Oh, it also saved my back in a crash where I went sliding up the hood of a car, bounced off the windshield, and landed on the pavement on the other side of the car... all on my back. The bag was unscathed, as was I. When i eventually got to work that morning, there was a package waiting for me with my new panniers.