Qual é a diferença entre I'll take "that one". e I'll take "it". ?Podes indicar apenas respostas exemplo.

In the example you provided, the meaning is the same.

Here is an example in which the meaning is different.

A: Do you have this jacket in different colors?
B: Yes, here is a blue one and a green one. Which would you like?
A: (*points at blue one*) I'll take that one.

In the above example, you cannot say, "I'll take it," because you are being asked to choose from more than one thing.

A: Do you have this jacket in blue?
B: Yes, here it is.
A: I'll take it.

When you say, "I'll take that one," the meaning is "I'll take that one (not the other ones)."

When you say, "I'll take it" you are only talking about one thing at a time.

I hope this helps! (Sorry if they are bad examples.)