Which pain killer is better, Oxycodone or Hydrocodone?

I accepted 2 Rx's of these thing, after they put a screw into my broken ankle today to set it. It tends to sting some and I may want to take *some* meds to get over the hump until the inflammation goes sway and I start to feel better.

The Oxycodone has no Acetaminophen and the Hydrocodone has none.

Which is more liver friendly? I just may need some for a couple of days only.

Thank you,

Joe