Coke or Pepsi, McDonalds or BK, tastes great or less filling?
After all is said and done I don't really think there is much difference. Do a search here there's been plenty written on the topic. If you get hired by FDX and sent to CDG or HKG against your will, UPS will probably win the QOL vote. Getting an interview and then a job offer from either one is equivalent to winning the powerball these days. You'd be foolish not to have apps in at both.