Well there is this nice little feature in both that allows persons to schedule an event and have a reminder sent out before the event. So with the event that's scheduled for Saturday on the AA3 server.
I just wanted to know if you use one or the other or like myself actually have both running in the background.
Here are the links to the Tacticalgamer xfire and steam groups.
TacticalGamer Xfire Group
How to join the steam group
TG AA3 Steam Group