Strangely AF gets the vote
I find myself thinking strangely.... Normally I would avoid Air France due to the risk of something in the supply chain going on strike. I went to Houston about six weeks ago with them, and found the business class to be good, and on time. I have to go again six weeks from now. GVA-IAH and have chosen them again. (I tend to favour Swiss, Continental and Lufthansa, and traditionally avoid anything involving Heathrow.) I suppose the Frs 3700 ($3700, 1900 pounds) fare helps. The main decision factor is that they now have the last flight from Houston to Europe each day, which is why I choose Lufthansa from SFO.
A triumph of hope over experience?