A345 versus 772LR DXBLAX the facts
See below. 772LR is 20mins faster, burns 17 tons less and can carry MZFW (with some margin for ADFU) while 345 takes a 9t payload hit. The problem is that the empty 345 is 20tons heavier than the 772LR and on top of that is betrayed by those antiquated 1967 RR RB211 (sorry marketing now calls them 'Trent') three spoolers.
A345
TRIP KLAX 138615 1547
CONT 20MINS 2929 0020
ALTN KLAS 6366 0044
FINL 3405 0030
T/O FUEL 151315
TAXI 912 0019
MIN FUEL 152.3 17:21
EZFW 220685 MZFW 229000 AZFW
ETOW 372000 MTOW 372000 RTOW
ELWT 233385 MLWT 243000 RLWT
772LR
TRIP KLAX 121517 1529
CONT CONTMAX 2600 0020
ALTN KLAS 5622
FINL 2839 0030
T/O FUEL 132578
TAXI 506 0016
MIN FUEL 133.1 17:03
EZFW 209106 MZFW 209106 AZFW
ETOW 341684 MTOW 343369 ATOW
ELWT 220167 MLWT 223167 ALWT