The important question is whether Taylor's Number is larger or smaller than Graham's Number. And if larger, is it by a countable or an uncountable infinity?
Probably larger. In terms of 'big but finite number', Graham's number is nowhere near the largest. There's Tree(3), others and then the current (to my knowledge) reigning champion, Rayo's number. With Subspace forming the very bottom layer of reality, beyond even the multiple dimensions the entities play in, its the closest thing to infinite, making the universe itself seem tiny. Mapping out the dimensions of that place is going to create a pretty huge number.