Trent 700 Dry weight: 4,785 kg (10,549 lbs)
Trent 1000 Dry weight: 5,765 kg (12,710 lb)
Trent XWB Maximum dry engine weight: 7277 kg (not including fluids, nacelle and aircraft interface parts)
So basically, you are WRONG unless the 7000 ends up sinificantly lighter than the 1000 (XWB got heavier). Add to that, the strengthening required in the wing to have a larger engine, and the airplane gains weight. That's it and that's all.
Same tired old fuselage and empennage. Same old wings with a fancy A350ish device at the end. Nice new engine, but more weight. Airbus knows it's a second rate airplane. That's why they are selling it cheap vs 787.
I think it's sad that you are so emotive about this that you revert to name calling online. Would it make my posts better or worse if I were to call you "Eurotrash"?
There are lots of sites for doing what you do. Try Vero Venia. He used to work at Airbus as an engineer and will set you straight on the facts.