Also keep in mind that those are 3 different types of superchargers that develop different torque curve shapes.

RIPP - Centrifugal
Sprintex - Twin Screw
Magnuson - Roots


Here's a general comparison of how torque curve shapes differ:




"PD Blower" in that chart would be "Roots". Twin Screw is missing from that chart, but it is a compromise between Centrifugal and Roots.Twin Screw has some decent boost at lower rpm (but not as much as Roots), and increases boost through the rpm range.

If Sprintex has higher peak boost than Magnuson, then it's most likely only in the higher rpm range.