Interview at both and if they both make an offer think about what is best for you. Interviewing is an important skill and I think it is good practice, especially if this is going to be your first airline gig.

You may have a better idea of what works better for you after you spend a long afternoon interviewing with a company.

Does Key Lime still do the "pay to play" First Officer program where for 30,000 I can pay to be a pilot?