Red Team Assessments are different than penetration tests because of the overall objective. The goal of these tests is not to identify and exploit as many vulnerabilities as possible like in a penetration test but to attempt to gain access to the target system(s) in the most efficient (and sometimes least noisy) way possible. Therefore, it is more targeted and actually attempts to breach your security.
As such, Red Teaming is also a good way for you to find the weaknesses on your IT team. And, of course, to help your IT team members to learn better or more efficient solutions. This assessment can also help you find the right training needed for your current team. The tests will help shore up your environment and protect you from future cyber-attacks.