When attaching plates to a barbell, is there a difference in load between using a 10kg plate and a 5kg plate versus using a single 15kg plate?

If the total weight is the same, such as using a 10kg plate and a 5kg plate versus a 15kg plate, the load itself does not change. However, factors like weight distribution, the thickness of the plates, and psychological factors might affect your balance and how the weight feels during movement.