Meaningless for the most part. Too many other variables and we don't even know what all was included in the cost...

Mgt, admin overhead, Mx, overhauls, dispatch, lease costs, parking spaces, etc, etc. Some airlines set aside money for overhauls, others just file BK when the airframes get too old.

Some of this may be variable based on geography. Also some of those airlines probably don't even own the airplanes in question.

But all this aside a high-longevity workforce is going to cost more than a low-longevity one. If your groups longevity is high plan on eventually losing either your flying to an RFP or your pay scale to the BK judge.