To anyone that hasn't tried a ric, you really should
I agree that the 4003s is probably more comfortable and I prefer the dotted board.
Ive got a 4003 and it's all about the tone.
I have not been able to find any other bass that can replicate that 4003 ric tone with both pups, it's truly unique, instant Chris squire.
If you get a good one, unlike Fenders there seems to be no advantage in buying vintage, you should be able to buy at around £1200 and sell back for the same, after you've satisfied your curiosity.