Not entirely tru as each airframe can have a different internal config therefore it is not a given that a 777 in all cases has more sests than an a340. indeed some of the fleet the diffrence is less than a dozen seats.
Indeed i would suggest that we are looking on the wrong deck so too speak i think that it is that the 777 offers more pallet space on the lower deck may have more to to with itpn tbe route rather than passenger capacity.
And as i statedt the main thing is that it is supported.
Oh and just to add i have heard that Omanair is talking to the daa also
And any updates on su?