A penetration test includes a number of vulnerability scans.
Those different scans will highlight different issues with the hardware and software installed in the organization. Those scans show what maybe an issue with the organisation.
If your organisation received a report that said that these vulnerability have been discovered but have not shown that they can be exploited then you are getting a raw deal and you are wasting your money.
A vulnerability scan will highlight issues, a penetration test will show if the bad guys can access your system and steal anything.