There are three type of corgs, generally:
Tw/gilf corgs. Girls look old and flabby. Aside from Greek they used to have no upcharge, now some charging extra for pse. Best service out of all corgs when you find right milf/gilf.
UTR corgs. Bunny house, etc. Dg session is really 260ish. Best lookers, younger than kgirls, service is very average with few exceptions.
Upcharge corgs. Pleasanton, Hayward etc. Girls are between milf and young, in average korg range. Everything is an upcharge so it ends up also closer than 300 side. Service better than UTR orgs but still not touching better tw gilfs or kgirls. Imo not a great value.