For 111" motors: Do you ride two up? 558. Just want more power across the board? 558. Lloyd'z recommend profile for a 111? 558. Do you ride solo out with your buddies and like to "race"? 585. Are you a high performance, more progressive rider? 585. Lloyd'z 558 cams are a low end torque cam. They ride alot smoother. while his 585s are a top end horsepower cam with a more aggressive feel and sound.
For 116" motors: A bigger motor can take a bigger cam. A 116" recommended cam choice is across the board a 585 due to compression and engine size increase.