don't think there is a big difference, but perhaps the second one sounds better in context of a complete sentence: "Wipe that frown off your face!" "Wipe that smirk off your face and get back to work."

I don't think there is a big difference, but perhaps the second one sounds better in context of a complete sentence: "Wipe that frown off your face!" "Wipe that smirk off your face and get back to work."