That fact that you are still employed with two other offers puts you in a pretty nice position. I would have to agree with those who say pick one and stay, not only does it raise eyebrows to potential interviewers, 2-3 years at year one seniority and pay makes me cringe. But perhaps you really enjoy the classroom and simulator :-) Keep in mind, there is no golden nugget in the regional airlines and in my opinion, while staring down a potential furlough either option is a pretty decent one.

I'm assuming that you have a little time to make the decision and did a little research on the airlines prior to interviewing. The long and short of it is the job is going to be very similar at both airlines. You need to determine what airline best meets your needs and desires such as basing, upgrade etc. If you have your eyes set on the Compass flowthrough, wait it out. However, by the time you are in a position to flow, there are most likely going to be options at comparable airlines to Delta that the same amount of experience at any regional would qualify you for. So if you are desperate to get out of Pinnacle well there you go. If you are simply asking which is the better regional, well I'm sure you know how that story goes.

And now that I reread your post, I have to imagine that you guys are leaning Compass as it would seem to compare best to your basing/commute situation at 9E. Go with your heart and you can't go wrong!