After a time delay lag my other post should have arrived by now.  I will add 
a bit more info though.
In my experience sale and marketing have no idea what kind of diff there car 
has and if they have a brand name or vague description they promise to call 
someone and get back to you but they never do.
I don't perceive a difference there IS A DIFFERENCE. I'm not just talking 
about a brand or a design.  The fact is a true LSD has very significant driving 
characteristics to a Torsen type of diff.  The characteristics are due to the 
very specific way the power is transferred according to the diff.  The torsen 
balances the power evenly across the 2 wheels by locking up when one wheel 
spins whereas the LSD switches all the power it can (varying according to 
design 
and settings) to the wheel with grip.
A back to back test on a wet road in a rear wheel drive car soon teaches they 
are quite different and not just a perception by myself or anyone else.
Also there are more than one type of LSD - clutch pack type is one made by 
several manufacturers while Cam and Pawl made (NLA) by Jack Knight is another.  
A Torsen is not an LSD and neither is a Quaife.
Wikipedia is ok but it's not always necessarily authoritive in my experience.
Regards
Daniel1312
In a message dated 21/06/07 21:32:31 GMT Daylight Time, derf247@gmail.com 
writes:
> I suppose Mr. Daniel uses the term "LSD" to refer to clutch type LSDs.
> Therefore he perceives a difference between "Torsen" and "LSD" where I see a
> Torsen as a type of LSD.  When the Mazda lady told me "Torsen LSD" she was
> simply stating that the car had a "Torque Sensing Limited Slip
> Differential".
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