Here's the whole paragraph. It's pretty obvious that the article is comparing the Trent 7000 to the Trent 700. Or am I smoking something?
"The fan hub for the Trent 7000 is smaller than the hub for the Trent 700, enabling additional improvement in the bypass ratio without having to further increase fan size. The smaller hub saves more than an inch in fan diameter, and associated additional weight. Of course, with a fan that is 15% larger, the low pressure turbine requires two more stages to move the additional size. That combination will make the Trent 7000 about 3,500 pounds heavier than the Trent 7000. Even with that additional weight, and additional drag from the larger fan, the Trent 7000 delivers 11% better fuel burn on wing than the Trent 700."
For those interested, this blog is written by an ex-Airbus engineer and invokes some informative comments by readers.
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