The short answer
Professional includes team management for up to 5 members, where each member uses their own monthly credits. On Enterprise the whole team shares a single credit pool, and pricing is per team instead of per user.

How your team uses credits with Professional and Enterprise.
Professional includes team management for up to 5 members, where each member uses their own monthly credits. On Enterprise the whole team shares a single credit pool, and pricing is per team instead of per user.