What is the difference between a repeater panel and a mimic panel in a fire alarm system?

A repeater panel looks nearly or identical to the main panel. You can control the functions of the panel that you can do on the main panel.

A mimic panel just simply 'mimics' what happens on the fire alarm system. You can't do any functions like enable/disable or sound/silence alarms etc. It has an in built piezo buzzer when a fire alarm is activated, the mimic panel displays this status and tells you the zone/zone description. It may also tell you any faults that have occured. You can silence the buzzer on this mimic panel.