Power is an ability, and in intelligent beings as such abilities are either
1.) Anything one can be responsible for or
Their difference is that the first includes what Latin speakers called peccata: mistakes, errors, sins, and wandering indefinitely to and fro. Surgeons have the ability (1) to effectively torture people, but this does not make torture included as a surgical ability (2).
If we want to speak of God’s omnipotence we can’t speak of it in sense (1), which is too vague and only appropriate to describing a finite creature. It’s an accidental sense of ability anyway, one that is included among rational abilities because some rationally creatures act out of ignorance.