Unlike functional testing, non-functional testing can only be applied to conventional systems, not artificial intelligence-based system

Functional testing focuses on what the system is supposed to do, while white-box testing focuses on how well the system does what it is supposed to do

Functional testing can be applied to all test levels, while non-functional testing can be applied only to system and acceptance test levels

Black-box test techniques and experience-based test techniques may be applicable to both functional testing and non-functional testing