Both Prime and LMS can do baseline compliance, after a fashion. LMS's is much more mature in my estimation. Prime is more around the lines of deploying templates.
The regulatory compliance functions as of now are in only LMS's Compliance and Audit Manager (CAAM) function. It's quite useful, matching the baseline compliance features.
An LMS license is included with PI, but it does need to be on its own server (or separate VM).