I don't know any difference between intuition and conjecture.
In my opinion: A conjecture is a mathematical statement that has not yet been rigorously proved. Conjectures arise when one notices a pattern that holds true for many cases. Conjectures must be proved for the mathematical observation to be fully accepted. When a conjecture is rigorously proved, it becomes a theorem, and intuition is prediction of any thing and how it will be in the future.
Question: What is the difference between intuition and conjecture in mathematics ?
Intuition is a quality someone has, a conjecture is a statement someone makes. Intuition leads to conjectures.
For example: Riemann's intuition led him to believe that all the zeros of the zeta function lie on the critical strip. This led him to make a conjecture that all the zeros of the zeta function lie on the critical strip.