The space is infinitely small indicates there is no space; and space is infinitely great means the space is infinite.
This equates to answering the question "what's the difference between white and black?" with: "White is white because it shows no colour; black is black because it is black."
That's the "physicist's" answer isn't it; absolutely right, but completely useless.
However, let’s take a closer look at your logic.
The space is infinitely small indicates there is no space.
Space is infinitely great means the space is infinite.
We cannot have an infinite number of finite particles.
Space without matter represents the physical reality of nothingness.
Nothingness is the only thing of which we can have an infinite amount.
An infinitely large amount of nothingness = nothing.
An infinitely small amount of nothingness = nothing.
Ergo, infinitely small = infinitely large.
