Any difference between: "Did you know anybody else that old?" AND "Did you know anybody else as old?"

Question

Somebody asks a very old lady "How old are you"? And she says:

"I am 101. Did you know anybody else that old?" Old lady (see:00:49-00:53)

I sometimes hear that another structure is also used when comparing two things. For instance for the case above:

"Did you know anybody else as old?"

When comparing things, "....that old" and "....as old?" both seem to have the same meaning.

So it seems that we can use both with no change in meaning, can we?

Answer 1

Actually, she says "Did you ever know anybody else that old?" She means "Have you ever met a person of that age (101)?"

That old refers to a particular age. As old [as] is a comparison. Alice could have said "Did you ever know anybody as old as I am?"