Hi Carlos 2,
after some rethinking during the day I came up with some extra's.
These Alembicians are very weird from time to time. In a way we Alembic-players are very happy with that because so they can come into our (sometimes) wild ideas about guitars and basses.
How I understand it:
the names Epic, Elan, Europa, Spoiler etc ... are at tthe same time the name of a model (design of the guitar) and the name of a type of electronic circuitry (e.a. tone control, PU, etc...).
Evrything is clear as long as you stick in the same family: Epic withe Epic electronics, Elan with Elan etc. ... BUT ... they don't stick that way. Or better, we clients don't stick that way: so you can order a Epic with Elan electronics etc... .It's mixing up!
To make it more complicate: the signature are some models (see the other post) but is also a configuration of electronics. So in principle you can order a Europa bass with Signature electronics.
On top of that: the SI and SII ( I think S stands for standard) were never actually models in the way of design. It is mere the name for an electronic circuitry. BUT (again) at Alembic they speak about a standard body (see Mark KIng) and a Small Standard body (see Stanley Clark). In the early Alembic years thise two body's (the S's) were the guitars available as a serie product. But: they made most of the time customised products. It's as is written somewhere: Customized?

They wrote the book on customized.
As far my knowlegde!
Paul