The guy who made that post seems adamant they are CAT - however another guy in the thread raises the same question you have (see below) - It may be that CAT have changed their design at some point?

Quote:

The shape of the adjuster nose looks different then the 440Source ones too. Mine look meatier all the way around compared to the pics of your Cat ones. If mine somehow are Cat rockers, then it seems they may have made a 180 on their design engineering and quality control.