Are you going to have to drop out of the TSA class to go to the CMR interview? It's a calculated risk... What are your times? If they're 1000/100+ I'd go for Comair (or even other places) knowing that a job will not be hard to find otherwise (almost everybody is hiring now. It's not the same as it was back in '02-'05).

Ultimately it's a decision you'd have to make on your own. If you won't have to leave TSA class to attend CMR interview, you might as well interview, then once offered the job have the decision to make. I personally would rather roll the dice with CMR (and its good pay) than TSA, seeing as both have strife with management. Might as well be compensated if you're going to be unhappy, you know?