The 777-200 is 63.7m long while the 777-300 is 73.9m long.
The main difference is that the 777-300ER is a longer ranged version of the 777-300.
The Main difference is that the Boeing 777-300 is bigger and can seat more passengers.
the 777 is bigger than a a330
Yes
A 777-200 takes 440 passengers while a 777-300 takes 550 passengers.
A 777-200 can hold a maximum of 440 while a 777-300 can hold 550 maximum.
The 777-200 can carry 117,348 litres ; the 777-200ER 171,176 litres ; the 777-200LR 181,283 litres; the 777-300 171,176 litres and the 777-300ER, 181,283 litres
Over 300
Currently they operate: Airbus A380, Airbus A340-500, Airbus A340-300, Airbus A330-200, Boeing 777-300ER, Boeing 777-300, Boeing 777-200LR, Boeing 777-200 Details taken from the related link.
The 777-300 can carry a maximum of 550 people while the 777-200 can carry a maximum if 440 people.
There have been a few problems with the 777 but after a bit of improvement the 777 is an extremely safe airplane. Otherwise the FAA wouldnt allow it to fly!