I’ve run the 6100, 562xp, and 555 all back to back. I will say that if you are 1/4ing logs by noodling them... you’ll want the 6100. The clutch covers on both the 555 and 562 jam rather quickly when noodling. The 6100 clears the noodles better. Also a conversion to the 5600 clutch cover set up gives you dual spikes which I like since I use the 6100 for inverted felling cuts sometimes. Most people want the outer feeling spike for appearance, but they are actually practical if you know what your doing.