If you end the game with a trigger type loose there is no debriefing text although you do get the debriefing screen. The loose outro plays automatically after the debriefing.
A loose ending occurs if any trigger of type loose is fired. With numbered endings such as End#1 then all the triggers of that particular type must be fired for the mission to finish. In this case the win outro plays.
Remember that loose has nothing to do with lose.