Miro is better. I have enterprise licenses for a million of these damn things, and Figma’s licensing / sharing is one of the worst. Guests can only edit for 24 hours, and you have to renew edit access every day unless you give them a paid seat.
Miro also has a slightly more robust feature set, also has lots of fun things in it, and is also fast.
Figma likes to enable free shit, not allow admins to restrict its spread, let an org adopt it, then start charging. Really shady business practice.