I love the sound of my 4001C64S, and have a line on a 4001V63. Do these have the same tone or are they different?

Also, is there any difference in the neck shape/thickness between these two models?

The C64 has the cap (horseshoe pickup), the V63 doesn't, which gives it a deeper/more bass-like tone.

Necks on the C64 from seem to be consistent from year to year (on the thin side), whereas necks on the V63 vary considerably from early production (1984) to when they were phased out (2001). I have a 2001 (V63) and the neck is quite hefty. but nice. The tone is considerably different from C64 to V63, mainly due to the cap or lack thereof.

I prefer the C64, although, the bridge does lift more than the on on the V63. That's because the V63 has the additional two screws.

Hi, I actually own one of the first V63's(FG to be sold in Ma) and I still gig with it often. I could not believe how powerful and actually too loud the horseshoe PU was and I replaced it with an 84 stock Hi gain. The neck is round not flat like the C64. It is actually closer to the MCCA sound than the C64 IMO> I own 2 C64'S and the Wings C64S, all have Polyhedron Flats and all sound and play a little different. The output of the horseshoe on the C64 is half the volumne of the V63. For me personally, the closest action with no fret buzz, no dead spots and equal volumne for every note on the neck is the best atribute about any Rick. With that said, my 74 4001 MG beats all of these. So go figure. Rick basses to the ear of a Rick player ALL sound a little different as well as play and feel slightly different from one to another. This is why they are so unique and the each one maintains the Rick sound and tone, but may play or just feel different. Hand crafted. I have owned, bought used, brand new, over 30 Ricks in my career, and nothing sounds like my 74' 4001, or plays like it. IMO

Not too sure what is the difference but I surely am in love of the tone of my 4001v63 with Rotosound flatwounds. It is the first bass with flatwounds that I ever loved.

For the record, it has the ''new'' horseshoe pickup.

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4001 '68 Noglo in restoration
4001 '73 Jetglo

The C64S has the two additional tailpiece screws as standard, which to me makes it a better long-term bet than the C64.

Also, there's nothing to stop you removing the cap on the C64S, or indeed fitting a push-pull switch as on the 4003.