MG TF Comfort handling pack vs Soft Ride Kit

The 'Comfort handling Pack' is available from MGOC for 750 GBP. The 'Soft ride kit' is available from Rimmers for 475. What is the difference between these 2 kits? Why is one significantly more expensive that the other? Is it due to the Bilsteins?

For £750, the comfort handling pack can usually be found at this time of year already fitted to its MGF!

This seems to be the answer:

https://www.mg-rover.org/threads/mgtf-softer-ride.865737/