Take the United Job. Can’t compare the two. I’m a F9 captain who had a class date at United. In the end I decided to stay here since I’m already in the left seat (~30% seniority) family, mid 40’s and home based. I still think the legacies are far better in term of potential growth, benefits, job security. I wanted to take the job and we shall see when I turn 65 if I made the right decision. I do love my job here and the people whom I fly with. Good luck with what you decide.