Is there a notable difference between Firefox Enterprise and standard Firefox with group policy management[0]?
[0]: https://support.mozilla.org/en-US/kb/customizing-firefox-usi...
From compliance checklist point of view, there may be enough difference. Addressing it is the point.
Sounds like there's additional governance options (notably, SIEM integration) and Enterprise SSO - but I suspect the main benefit from the enterprise pov is going to be the account management and support teams.