Talk:Mission/@comment-60.241.79.142-20161215052057/@comment-162.196.133.235-20170118205140

There are slight differences in the HUD on the left side. Depending on the objective, it will say (for example) Enemies: 44/132, a timer, Reactors Destroyed: 1/2, or something else.

Or you can just look at the mission type before you start the mission.