Award travel- definite advantage to UA. Compare award charts to see the difference.
Also don't forget US, they have no nonstop TATL flights ex ORD but they do fly PHL-FRA and their Envoy Suites are very competitive and probably the best business class transatlantic. Also they are better in terms of award redemptions (although they do not offer one way awards, their award charts are more generous and their routing rules more liberal).