I'm confused, are you asking ABX vs AmeriJet or ABX vs ATI.
AmeriJet pay, benefits, work rules and retirement are not comparable to ABX.
Lets just take pay at year 3 (current upgrade time at ABX)
AmeriJet - FO - $104 ($81,120), CAPT - $143 (111,540)
ABX - FO - $148 ($115,400yr), CAPT - $218 ($170,040)
Retirement
AmeriJet - $.50 match up to 4%
no Defined Benefit or Contribution
ABX - $1 match up to 3.5%
5% Defined Contribution
Really, just the tip of the iceberg...unless you live in Miami, I can't see any reason you'd want to compare these two.