@Joachim Lassus Thanks for posting in our Q&A.
For this issue, they are not the same thing. It seems that “Learn More” of Intune Portal is an incorrect link. Intrusion Prevention is corresponding to the CSP:Defender/AllowIntrusionPreventionSystem. We can read the following article as a reference.
https://learn.microsoft.com/en-us/windows/client-management/mdm/policy-csp-defender#defender-allowintrusionpreventionsystem
For the incorrect link, I will try my best to feedback.
Thank you for your careful discovery of this problem.
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