Well? The Definite is in-game event did not require any extra assess or script to host or to start the event, while the Server Event need a server restart to swap out the standard RP file with the Event assets/scripts file to host/ start the server Event.
In-game events usually last a day, while the Server Event goes on for 4 to 6 days of the week before it ends.
------------------ In-Game Event -----------------
------------------ Server Event -------------------
Military/ cop Vs Civilian/ revolution or Military vs Military are batting out over different location outpost.
----------------- Holiday Event ------------------