Also.... one may have the "mod" in it while the other don't. That will make a great difference. It's hard to say nowadays.
As for the color of the knobs,I really don't think that can be used as a guide. I have a "Sessions 400","Profex II" and a "Nashville 400", I have swaped the knobs from one to the other for one reason or another.(like playing in a dimly lite place. I can see the reverb or other knobs better.)
And what John Light said.....
[This message was edited by Bill Crook on 07 December 2003 at 02:50 PM.]