Sorry to differ sir, but basing on his question, I don;t think
it's different kind of planes. DAlforce is right..its same type but
different series..
e.g B777-200 is the first basic B777, then the -300 is longer ,more
seats but with shorter range, the latest B777 -200LR is same
configration with pax seating as the first 200 series ( but has
ultra long range, thus the LR )
U guys should check out the engines that will be deployed on the
B72LR.!!
Oh,btw, Pax seating varies wz different airlines.
Like Evo6,7,8,9...hahaha..still seats 5 but higher specs ,power,
etc..
hope this clarifies..
Cheers