Say you're taking a 20 - 30 second exposure photo in a dark (but not completely black) environment and using flash.

If there is a moving object (say a car going past), I understand the different effects that would occur if the flash is fired at the beginning of the exposure, or at the end of the exposure.

But what if the object is stationary?
Two photos, identical in every respect, except one had the flash fire just after the beginning of the exposure, and the other had the flash fire just before the end of the exposure. Is there any difference between the resulting images?