Oh yeah they are, huh. Then I guess GM would have had no reason to make the knobs interchangable, since they changed the ash tray design anyway.
I'd order one anyway, just to try it but lately everything I've been ordering on a hunch that it might fit has turned out to be a waste of time and money.
I guess I could get the tan rose one and just paint it black. The chrome would have looked so cool though.