B3 and C3 are the same. So if you think you prefer the sound of one over the other, what you really preferred was the sound of that specific organ on that specific leslie in that specific place you played it on. You could play the same kind of organ in a diff. room or with a different leslie (even if it's the same type of leslie) and it would sound diff. With this kind of analog equipment it's just like old studio gear, no 2 specific instruments will sound exactly the same even if they have the same model name.But, just to clear it up, the B3 and C3 are the SAME instrument with a different look.