With reference to inclusive education, which of the following is the fundamental and most accurate difference between 'Differentiated Instruction' and 'Universal Design for Learning (UDL)'?

Differentiated Instruction is a teaching approach where the teacher makes individual-level changes in teaching methods, activities, and assessment based on students' current abilities, interests, and learning styles. In contrast, Universal Design for Learning (UDL) is a curriculum design framework that provides flexible options for multiple means of representation, expression, and engagement, taking into account the diverse needs of all types of learners from the very beginning of the learning process (proactive approach), so that the need for special adaptations later is minimized.