From what I've noticed, subs from the bush tend to be more elegant looking - taller and thinner stems, flatter caps with umbro nipple (more UFO like!), caps slightly lighter in colour and slimier, stems usually appear 'dirtier'. The ones found in woodchips seem to be chunkier, more fibrous & thicker bright white stems, generally bruisiung quicker and darker, caps seems to be darker and more leathery. Anyone else find this as well?