Board Thread:Naruto Discussions/@comment-30168130-20170423205927/@comment-734582-20170424062007

Lorenzo.r.1st wrote: yeah, but does it increase, quantity-wise? Doubtful. But keep in mind that more powerful chakra means you have effectively more chakra.

IE, if you burn a cubic meter of wood or a cubic meter of gasoline, the gasoline will release way more energy on burning despite being the same volume.

So while Sasuke may not have a lot more chakra, with more powerful chakra he can use either less chakra for the same effect, or get a stronger effect with the same chakra.