I recently had an old LCD monitor power supply go bad and figured I would try replacing the caps, all four of these were bulged and or leaking. They are all rated to 105 degrees C, all 1000uF and 25V yet two of them are much higher diameter. In my experience with a physically larger capacitor, you either get more voltage (more plate separation?) or more capacitance (more plates?), why are these caps different diameter?
Side question, the board had more than enough space for the larger caps everywhere, why not use the large (or small) caps everywhere for higher quantity discounts.