A similar comparison....
An analogous comparison would be the B-757 vs. the A-321. Never flew the 757, but, talking to those who have flown both aircraft, the common
response: no comparison. But, Airbus says otherwise.
With regard to the line maintenance subject, I have no experience with the B-777, but I can tell you the Airbus is very easy to maintain on the line. Granted, the Bus breaks a lot, but, if you have the replacement
"boxes", it, in most cases, takes longer to fill out the paperwork for the repair than for the repair itself.
And, the line machanics don't have to have a whole lot of system knowledge to fix it. The CFDS BITE system pretty much spells out the problem for you. All that is left to do is "plug 'n play".....remove one box,
and replace it with another. Doesn't get much easier than that.
Fly safe,
PantLoad