They want a report on the fuel differences? Should have asked for a report on ecs diff's.
700/900 bigger tanks, 19,595 total pressure fueled vs. 14,518 for the 100/200
APU feed 700/900 a dedicated dc powered apu fuel pump from left collector tan. 100/200 APU and crossflow share the DC pump fuel taken equally from both wing tanks for the APU.
Crossflow 700/900 bi-directional pump to transfer from one wing to another. 100/200 dedicated xflow/apu pump and transfer valves used to transfer from one wing to another.

That’s it! Pretty damn similar.