Seniority is everything as they say. I'd do the interview if you are really curious, but with the retirements at UAL vs DAL it's a hard sell to recommend leaving UAL.

Famous last words, but with the movement coming up you probably won't have to sit much RSV (assuming you don't continually bid senior airplanes). So the RSV rules sucking at UAL might not matter much. Profit sharing is great at DAL, but with the increased seniority at UAL you could 'buy' better skeds, premium pay, sooner upgrade, etc.

I'm at DAL btw.