They are different.
Knowledge is changing all the time. When we engage with the world, when we encounter data or new experiences, our knowledge changes.
But belief is what we call the things that remain, especially and especially in the face of the evolution of knowledge.
While more knowledge can change beliefs, it usually doesn’t. Belief is a cultural phenomenon, created in conjunction with the people around us.
The easiest way to discern the two: “What would it take to see or learn to change your mind about this?”