Yes, that was what I meant - as in what is the difference btw the standard feeling ride on the 420 and the SLS on the 560. Unfortunately I was not aware the 420 offered the SLS ride -thanks! Can you answer either of my questions in regards to the standard 420 vs 560 SLS ride - I would certainly appreciate it. Many thanks,the SLS system is identical between both models, there should be no difference at all. There would only be difference where the 420 had standard springs/shocks.