My camera is giving me problems... But 6500 cases, like Pre-V cases, have very a very distinct and pronounced lug shape. Lugs are thick and somewhat crisp/sharp, with a flat foot bottom.
6502 lugs have a less distinct shape, with a more rounded and smoother nature as compared with its 6500 brother. The flat foot on bottom of 6502 lugs is pretty polished and slightly rounded... not flat and sharp like the foot and lugs on the 6500. If I can get my pics up and running at some point, I'll show the difference.=))
Have a great sunday!