Rather than post the whole DAL side-by-side, one note:

Pay attention to the rigs. Specifically minimum pay per duty period vs. minimum pay for calendar day and how deadhead only duty periods figure into that.

Long story short: Minimum for duty periods can look just fine until they start throwing in 30+ hour layovers - or a day in which you only deadhead. It will kill a trip credit.

Concentrate on a minimum credit per calendar day. I'd personally like to see 6:00. But, you get the idea.