Personally, I see it like this:
Firm Sports Ride -------------Medium-------------Comfy Limo Ride
Basically the more sporty the ride the less limo like it gets - handling changes.
I guess by them saying that control blade has a wider range of settings means that the above is for Control Blade IRS, and below is for the AU IRS:
Falcon Killer (if you believe what Ford Service Departments have to say about me)
AU II XR6 - October 2001 ~ December 2002 - RIP
BA XR6 - December 2002 ~ Soon to disappear if Ford CRC can't fix it....
45,000km service coming up - and i'll be asking for a sizable list of fixes:
* Gearbox (3rd time)
* Steering click (5th time)
* Brake Shudder (2nd time, and has the applied "Fix")