As others reported not long ago, the fact that there is no diff between sport and comfort it means you need to replace some of the AHC components. I think the guy reporting this changed the globs. Have a read here
AHC confort vs sport
Up to now i hadn't seen anyone compare the AHC settings and the difference they make like these guys did in this video. I'm not sure how much was changed between the 570 and 600, but the difference on mine feels night and day as well. I thought about doing a similar comparison but mine is modded...
forum.ih8mud.com