Maturity Level And Overhead on Monitored System describe a situation where those two parameters would be the most important evaluation criteria. Relevant variables from the following list should inform your situation:

Industry $($e$.$g$.,$ e$-$commerce, financial, medical$)$

Security team capabilities and skills

Potential threat actor motivation $($e$.$g$.,$ theft of data, money, or intellectual property; denial of service; political gain$)$