Depends for what you use them.
You are comparing apples with oranges so to speak.
With the higher voltage the general power is higher for the 11.2V battery but you can not use it to power a 7.2V RC car.
In perfect conditions you can say one delivers 4amps for an hour before the voltage goes down to unhealthy values, while the other delivers 5amps for an hour but at a lower voltage.
Bookmarks