Yes I am still on vacation. No I don't have a ton of time to do wiki things. Basically 0 time.
Always follow the naming convention in-game. So, keep the one with the exclamation point.
Video proof since we're away from the event.
EDIT: as far as I know, these are the only missions that have an exclamation point in their title:
-Total Caketastrophe!
-Save Winterfest!
-Grinchlin Assault!
-Built to Destroy! (thanks Bopp)