The 2-line description of these 2 features (as they differentiate between free plan and the standard plan) say the following respectively. I understand that this means that adding a user to my project means that they automatically get admin permissions. But does this also mean that if I add a user to Project-A, they have access to Project-B in the same workspace?
Assign roles to different users, like administrator or end-user. Different permissions apply to users depending on their role. In the Free plan, every user is a project admin.
Permissions in Jira Software control whether users can create new projects to what users can do, see, and comment on within a project or issue. The Free plan doesn’t allow permission settings for projects or issues.