Board Thread:Questions and Answers/@comment-6299840-20130209104653/@comment-25829922-20141207214338

That is a big part of the difference between a Vasto Lorde and a Gillian. In fact, if the difference in the size of the area is proportional to the difference in size between the two, the Vasto Lorde's far greater power can be explained almost entirely as being simply better controlled and far more dense reiatsu. In other words, the impact this can have means that in terms of force of reiryoku there does not have to be much difference at all between a Vasto Lorde's and a Gillian's.