I would say a lot depends on the club and why you want to change it. Some clubs have a good set of instructors who the CFI ensures all teach the same things, others have instructors who have maybe not been picked so carefully and each instructor teaches things in their own way (all instructors teach slightly differently in approach, but the content should be much the same in any one school). I would say have a chat with the CFI and see how you feel after that, but unless the club definitely falls in the second cat and you have no real reason to move then have a chat with the instructors where you are and see if you can find one you feel comfortable with, then go with that.