It is ultimately up to individual preference and the specific needs of a situation as to which assessment tool is more beneficial. The MBTI looks at personality types based on Jungian theory, while DISC measures behaviour styles in four categories: Dominance, Influence, Steadiness, and Compliance. Both can be useful for understanding communication styles and strengths within a team or organization. However, it is important to note that neither assessment should be used as a definitive measure of an individual's capabilities or value. They are simply tools for enhancing self-awareness and improving interpersonal relationships. It is also worth considering other assessments or methods in addition to either MBTI or DISC. Ultimately, the effectiveness lies in how the information is interpreted and applied.