The orange GB bars are the Titanium bars, which used to look like the bar on the right The exact name eludes me at the moment and paint is all rubbed off mine. Great bars. A small step down from that is the Pro-top bar w/ replaceable nose, kind of like your Stihl Rollomatic ES bars. Below those, is your Pro-Cut, which I believe is like the Rollomatic E bar. Then GB has a hard-nose bar.
Chris B.