The Mean Street, the Lean Mean Street, and the Desert Warfare Mean Street were all of the same basic design.
Mean Streets were sold as 1/4", but were seen under and over that thickness, some almost a full 5/16".
Lean Means were, I think, 0.20, maybe 0.220, I'd have to mic a couple of mine.
Desert Warfares were supposed to be under, like the Leans, but I have seen several thicknesses ranging from 0.20 to 0.297.
The Meaner and Leaner Meaner were recent incarnations, with a handle somewhat reminiscient of the Active Duty, and a blade config like a Bandicoot.
Hope this helps.