You are correct. If it actually exists, then in the sense that mention, it appears to be different.

But keep in mind that our best theory makes no reference to height, width, length, or time as independent isolated entities. Einstein referred to spacetime. And no one has come up with a better, more consistent, explanation since.

My point in my response is that it is seemingly nonsensical to pull out any single dimension from "spacetime" and think it has any real meaning.

Can one have length without time? Can one have time without height? I would argue not in our universe as we understand it.
DA Morgan