Does anyone know how does the manual tranny Sprint Booster differs from the auto tranny version?

 

It is more aggressive, a lot of people with manual transmissions have opted for the auto version. I have not driven a XF with a manual and a manual SB so I can't say for sure but I have driven a XF with a manual with a auto SB and thought it was just fine but that is my taste. You can use the auto version on a manual but you CAN NOT use the manual on an auto. By the way My car has an automatic transmission and I do have a SB installed.