I'm planning to fly PHL-LHR in April and just looked at flight schedules. At least going outbound, there is a BA 777 and a AA 787 leaving within 45 minutes of each other. RT fares are identical. I have flown Club World in the old 747 but not the 777. Leaning towards BA for having different service than AA (and it being a good experience) but curious as to others' thoughts.