It's 2 bottles per wing
Well I never - The 744s I flew for the best part of two decades, all with the same company, very definitely had two bottles
per engine - I didn't realise that a two bottles per wing option existed on the 744.....
what operational reasons make the 744 a better aircraft than a 777-300ER?
Is it? The 400's great when you can fill it with passengers paying full fare, has a superb first class, bunks adjacent to the flight deck, and you don't have ETOPS criteria to contend with. OTOH the 777 is more modern, cheaper to run (alledgedly ) than a 744 and some argue often has a greater freight (weight) capacity......oh and it can autoland in 40 knots across
, and it's newer, and it's got ADS/CPDLC by default, etc, etc.
Whatever your preference they're both top aircraft.