Paul McCartney plays Mesa, the easiest way to get a great tone :-)
I've had the opportunity once to hear my Spoilers next to a great '77 Series I (
This one, check out the back of that headstock (!))
To my ears there's no mistake where they both came from, the Alembic tone is unmistakably there.
The highs and lows on the Series are clearer... hard to describe :-)
The best tone ever coming from my fingers was with Wilfred's Blondie (
This one)
I was really amazed how deep and clear she sounded, with a really nice tone.
Since that day I'm in love with the Series I SC model, must have something to look out for once the Elan 5 is here :-)
Now let me introduce to you: Alembic heavy sounds!

:
Youtube link I had a slight argument with the foh man, so I was a little loud that gig...

(you can hear that great McCartney sound)
Here's a link to more recordings (Live and studio recordings, will be online temporarily)
That's my Alembic (and Mesa) tone :-)