So it uses diesel type combustion to achieve diesel type efficiency ( a bit less actually ).
( And requires hefty preheating to get past the high octane rating of petrol )

Whats new?

Well the dreamliner is supposed to replace the 767 and compete against the A330
and the nook upwards.
It was sold to customers as being 20% more fuel efficient than a 767 and thus slightly
besting the basic A330 specs from around 2002.
But the current implementation is about 10% overweight ( seemingly for the forseeable future )
moving it into A330 ballpark figures ( Similar empty weight ). Improved engines with better SFC are
available for the A330 as well. One reason the A330 has sold quite well in the last 2-3 years
while dreamliner sales have tanked shortly after the initial rollout 2.5 years ago
( i.e. after it was obvious that the dreamliner was a potemkin liner )
Quite a lot of customers currently seem to stay the ride more for cashing in on penalties
than actually receiving any planes later on ( The current backlog will not be satisfied before
2020/2022)

The A350XWB on the other hand is not a direct competitor to the dreamliner.
It fits above the 787 and below/into the 777 space. Which is rather typical.
Neither Boeing nor Airbus stage new types spec by spec against a competitors
distinct type but try to hit the weak spots in between with the initialy
produced version.

Good observation.

The NTSB made an unexpected announcement on the B777 crash in LHR due probably to ice slurrie
in the fuel with uncalled for blame shifting just before the primary investigators in the UK
did their public announcement.

The NTSB going for partisan announcements is a very bad sign directly connected to
Boeing being in dire straits these days. So any published findings of the NTSB
may be completely worthless.

G!
MACC