For A330neo Wikipedia page, is written:
A330neo enables profitability on shorter ranges where the longer-range A350 and Boeing 787 aren't optimized.
For what reasons it is true?
A330 and A350 have almost the same size, weight and passenger capacity (the undeveloped A350-800 should be also more similar), and also engines are very similar, the same family Trent 7000 vs Trent XWB.
I thought that with almost similar planes, the bigger difference for calculating range could be only the fuel capacity (surely bigger for A350), but efficiency (in terms of lower weight due to advanced materials, lower fuel burnt due to new engines technologies) could be an "always true" concept.
So, why for shorter routes A330neo is more efficient than A350? Could not be enough to have an 350 with lower fuel capacity (in case shorter length) and maybe reduced engine power (the opposite of higher power in A350-1000) thanks to reduced weight?
I found this similar question, but I think that mine is more focused to general concepts because I'm asking also "what makes an aircraft more optimized for longer/shorter routes.