I maintain a CV discography:
http://ccs.nslsilus.org/~mkolmar/music/CabaretVoltaire.html
Info taken almost totally from my personal collection.
So you've come to the right place.
This will sound rather vague, but:
First, I don't hear what I'd call a big difference between the projects.
Though there is a certain flavor that each one has. Not enough to my mind
to warrant different project names, but then I do heavy "industrial",
experimental noise, the occasional dance track, and anything else--and one
day when someone sees fit to release this stuff (it would help if I had
any grip on how to market and promote) it all falls under the name
"Burning Rome".
Except for the Sweet Exorcist project, I believe Kirk composes it all
himself. Sweet Exorcist is a collaboration with DJ Parrot.
The credits for Sandoz say "Arranged and produced by Sandoz". No writing
credit that I remember. Similar for Electronic Eye--"Arranged and
produced by the Electronic Eye".
I have a couple theories about the names. Notice that Sandoz is released
by Touch. Sandoz is also the name of a large pharmaceutical company, so
I could easily see problems with domestic release (Comsat Angels were CS
Angels in the US after being sued by Commucations Sattelite.) The older
Sweet Exorcist was on Warp, but the last one was also on Touch. The solo
album was on Warp. Another solo album is reputedly coming out on Warp in
the next couple months. Electronic Eye is on Beyond. Label politics?
Another theory is that each project just represents a different method of
working, or a particular kind of result regardless of method. Sweet
Exorcist, at least the last album, uses a lot of lifted tribal beats.
Sandoz seems heavier on the sampling. The Kirk solo stuff is a little
more ambient and weird. And the Cabaret Voltaire has more edginess to
it.
As far as the Conversation is concerned, I'm pretty sure Mal is in
Australia, and Kirk has the go-ahead to proceed without him. Mal is
probably there only in spirit but CV is Kirk/Mallinder. (Maybe like
late-Beatles "Lennon/McCartney" writing credits.) Mal is more the
socialite, and Kirk was never much for travel or playing live.
I can keep an eye out for CV CDs. Which do you want? I'd be glad to
recommend standouts. Some of the albums are "real albums" and some are
kind-of "asides".