Panic Hardware and Fire Exit Hardware are two different types of exit devices, and the proper selection is determined by code requirements.
Panic Hardware is an exit device which is tested for use on a door that is required to have panic hardware, but cannot be used on a fire door. Panic hardware typically has the dogging feature, which allows the latches to be held retracted to create a push/pull function.
Fire Exit Hardware is an exit device which is tested for both panic and fire conditions and is required to be used on fire doors where panic hardware is required by code or desired for durability. Since fire doors require positive-latching, fire exit hardware does not incorporate mechanical dogging. If a push/pull function is desired for a fire door, electric latch retraction hardware may be installed, as long as the latch projects automatically upon fire alarm.