When I bought my '85 4003 I had 4 Ricks to choose from, and no knowledge of differences in models, as far as 4001 vs 4003, model years, etc. I was aware of the "S" model difference re: binding, dot inlays, mono output. This was back in '91, BTW.
I got to spend significant time with each, as they were all at my house and/or rehearsal space. My choices were:
- The '85 4003 in Ruby
- A 4003S in Ruby, don't know model year
- A Jet Glow, don't know if it was 4003 or 4001, or model year.
- A '78 4001 in Autumn Glow
Here are my recollections.
The two Ruby basses were "nearly" identical in terms of how they felt in my hands, and I don't remember if they sounded any different. The S model was a bit more comfortable as it had contours, it's neck was ever so slightly thicker, front to back, but nothing that put me off. The neck also felt a bit different due to the lack of binding. My decision between these two, the only real contenders for me, came down to looks - the binding and inlays look bada$$, so I chose the 4003.
The Jetglow was good, don't recall anything about the tone, the neck was a bit thicker still. If I really wanted black, I'd have bought it, but the Ruby was calling me.
The 78 Autumn Glow was not even in contention. The neck was the thickest of them all, by a long shot, and thick enough to make me not really want to play it. The others just felt so much "faster". The bass also felt sort of lifeless in my hands, I couldn't really feel the bass vibrate - which is a key deciding factor for me. Unplugged, a bass needs to feel alive to me, this felt dull and lifeless. Don't recall the sound really, other than I remember thinking it needed new strings to really get a sense for its sound, but since I didn't like the neck, I didn't bother with it.
Not sure if this really helps at all, best I can do considering the passing of time.
One more thing, a friend has a white on white 4001, from the mid 70s I think, not sure. I played that one night and thought it was OK. Neck was thicker than I am used too, bit didn't put me off. Tone was "honkier" than my 4003 (I have installed "the cap" in mine), but it still sounded good.