look vs. listen up

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“Look, you just told me that he knows that you want the bedroom painted. You don’t have to tell him anymore. He already knows.

Hi, I know native speakers of English use "look" to raise the attention of the listener(s), but I wonder whether native speakers use "listen up" for the same purpose. Are they alternative?

I feel "look" is more colloquial, while "listen up" is a little bit of commanding. Correct?

Thanks!