Briefing Dialog
The XvT Briefing dialog behaves the same as TIE, although there is the cosmetic difference on the main display. All of the events behave exactly the same, and in fact the briefing can be converted from TIE to XvT and reversed simply from copy and pasting. The only real differences are that Unknown3 has been activated for XvT and there is a possibility of two extra events.
Also not shown above added in v1.3 is the "Visible to Teams" tab, which is primarily for multiplayer purposes and allows for the editing of all 8 briefings.
Remaining information can be viewed on the TIE Briefing Dialog page.