In my study and experience the two assessments measure different parts of a persons “soul” (if I can use that term). Neither one can be definitively labeled as more accurate than the other. It’s important to note that any assessment or test should be used as a tool for self-awareness and growth, rather than a definitive measure of one’s personality.
The DISC assessment measures four primary behavioral styles: Dominance, Influence, Steadiness, and Conscientiousness (also often referred to as Choleric, Sanguine, Phlegmatic, and Melancholy). It measures the underlying, unchanging temperament style of the individual. The DISC assessment is relatively easy to administer and is known for its simplicity, making it a popular choice for many organizations.
On the other hand, the MBTI assessment is based on Jungian psychology and measures four dichotomies: Extraversion vs. Introversion, Sensing vs. Intuition, Thinking vs. Feeling, and Judging vs. Perceiving. The MBTI is often used in personal growth and development contexts. It is known for its ability to provide individuals with deep insights into their personality, preferences, and potential areas for growth.
While both assessments can provide valuable insights into an individual, DiSC measures temperament and Myers-Briggs measures personality which can change over time based on a large number of factors such as education, culture, gender, family, friends, to name a few.