How to improve billing address pattern?

I'm trying to find the best pattern to use in a sales service flow where some employers will be using an app to sale products in local stores. They will keep in touch with many clients so they need to spend little time on feedback (it's an important issue here).

My problem came up trying to accomplish the best use in the below flow:

Client address is required, but the billing address may be different from the first option.

I've worked two alternatives, but I still have doubts about the best pattern:

two ways in which I might do this

Option 1 (with checkbox): unselected by default, when it was selected, appear the billing address with "X" to go back.

Option 2: I've defined a condition with radio buttons. It's much simpler than first but looks better!?

I'm a native Spanish speaker so the labels may need to be improved as well.

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