I don't know where you're from but that sounds a bit backwards. Where I was from Cess was just shorthand for Sinsemilia, or without seeds, apparently some people just never realized the spelling or pronunciation. In reality it should be higher quality weed, of course it was all street crap and far from the "kind bud" or "chronic". More like decent stress with few seeds.
Regular in the sense he's meaning is just pot grown without a standard. It isn't grown right, picked right, cured right, and often times get bricked up with it untrimmed. If that's what you want you can certainly grow it with any seed.