Good question
I've always used Autosol and bought Peek from hardware store as they didnt stock Autosol
but they recommended it
I tried it once and it didnt manage the same results , I think this due to it not being as abrasive as Autosol
I think Autosol cleans and revives more from metal that has deteriotated
whereas Peek is to be used more as a polish ( a buff up ), similar to Brasso
I haven't used Peek since
might give it a whirl when they're due a cleaning