Having both blowers I've been perplexed by people saying the 600 is as powerful as the 8000. Honestly it seemed a pretty stupid comparison. The RM 8000 moves so much more debris. I know brand loyalty blinds people, but it's such an obvious difference. So in very simple terms the 600 nozzle is tapered and much more narrow than the 8000 creating a very narrow but powerful stream of air. The 8000 end is wider creating a much wider path. So they do blow the same but the RM blows a much wider area making it much faster. You could take a RM 7001 taoer the end tube to increase the wind speed and cfm.. If you remove the Stihl's end tube the blowing path becomes wider that of the 8000 but with much less power.