As mere SLF, I've recently travelled to Shanghai on business and checked out BA economy plus for the trip from Heathrow, at £2500 return compared to £1500 business class with KLM via AMS.
I realise that the communist 60 year celebrations were only 4 days from commencing when i travelled that maybe a premium was going to be paid but £1000, my point to this is how AF/KLM can charge £1000 less and offer business class.
On another note, the 747combi KLM flight was fantastic, great crew my only question was who was the man travelling with his wife who kept entering the flight deck for periods of 2-3 hours and was even on the flightdeck for trake off and landing