So I've heard the Meyle balljoint is all metal...which I guess means metal ball and socket both...and I thought I'd read that ZHP arms also have all metal balljoints...though I don't 'know' that that's true.
I know my balljoints have a metal ball in a plastic (nylon?) socket (or 'believe' I 'know' that). Anyway, the construction of the balljoint might be another factor adding to the feel of the CA in addition to the construction of the CAB.
It's discussions like this, though, that confirm for me that OE is the way to go if you want to sleep at night!
Someone should cut through all our balljoints and cabs someday! Maybe it'll be me...as I'm sure I can find a number of these old parts around my shop!