Official: OVERALL

Live - Rank changes depending on who is leading the event while you are watching.

During race
Day2 - this is the day 2 ride times, plus any given day 2 timebar, manual penalties, GPS off track penalties.
(NOTE:- during the race Day2 includes time penalties for checkpoints not yet reached)

After race
Total time - OVERALL time for the event (TTQ, Day1, Day2), 
Difference  +0s (zero seconds) is the fastest competitor. Example= +2m30s this means the Differential time is +2 minutes 30 seconds slower than the fastest competitor.