Hey guys and gals-
Sorry, I wasn't paying much attention to the boards lately. I have a Persuader 5 and a Spoiler 4, both from the 80s. Those early five string basses are pretty tight and feel almost as if someone jammed five strings onto a four string neck. It isn't quite that tight in reality, of course.
The short answer for Jack is that I believe he should feel very comfortable on a four string made with Alembic's classic neck taper.
The traditional, long-winded answer is more like this...
I would say that a fingerstyle or chording player would be very happy with the tight spacing. The combination of the narrower spacing with a shorter scale length makes for comparably effortless playing, at least for me.
If you're a more casual player, then I believe you are best off with a bass that matches your size. A 6'+ tall player that wears size XL gloves is going to play more cleanly on a long scale bass with average to wide string spacing. If that player practices to the extreme, then maybe the can be a better player on a tightly spaced short scale (Stanley, for example). At 5'10 and wearing size M gloves, I am instantly comfortable on a 32 scale bass with slightly narrow spacing. I once played a Distillate that was 1/8th inch narrower than standard at the nut and it felt great from the first notes.
Speaking of Stanley, I just followed another thread here to a GC interview he did. That links with this conversation in that he emphasized the importance of a beginner finding a bass that fits. I believe that is true at all playing levels.
One final anecdote I will throw out there. I acquired a short scale Alembic early last year with customized extra-tight string spacing. The first week or two of playing it, I felt it was too tight. I thought it would be perfect when I bought it, but it was hard to play so I ordered my custom a hair wider. After I became more accustomed to playing it, the ultra narrow spacing feels great. I am very happy with the results of pushing myself to play the smaller instrument.