The Difference Between a Skillful Mind and a Released Mind
I would say both minds have different resolves.
A skillful mind abandons what is unskillful, and maintains what is skillful. And what is skillful? Renunciation, non-ill will, and harmlessness.
Yet a released mind relinquishes what is both skillful and unskillful.
For these effluents of sensuality, becoming, and ignorance, when seen with discernment, develops dispassion for them. With dispassion, these effluents come to cessation.
And what exactly is dispassion? That these qualities, these very effluents, are worthy of relinquishing, not picking up.
Even when touched by these effluents, a person doesn't become agitated because of that direct knowledge.
Thus a skillful mind leads to becoming going along with those effluents, siding with merit, but a released mind is free from that very becoming, seeing the fault in effluents.
So where do those resolves stem from?
Skillful: "There is what is given, what is offered, what is sacrificed. There are fruits & results of good & bad actions. There is this world & the next world. There is mother & father. There are spontaneously reborn beings; there are contemplatives & brahmans who, faring rightly & practicing rightly, proclaim this world & the next after having directly known & realized it for themselves."
Released: "Whatever has been brought into being, is fabricated, willed, dependently originated: That is inconstant. Whatever is inconstant is stress. Whatever is stress is not me, is not what I am, is not my self. This is the sort of view I have.”
A released mind is harder to achieve compared to a skillful one, but it is possible. And that possibility is given to you and everyone else too, thanks to the Buddha, the Sangha, and the propagation of the Dhamma.
I think for me that realization came when even clinging on to this Dhamma was stressful. When I read this line from Venerable Sariputta, "Indeed, it seems that the One Well-Gone speaks to us of the relinquishing of each of these qualities through direct knowledge," I came to realize that too. So look into your practice, and aim for a released mind. The teachings are here and now, well-translated, well-taught, for those who wish for release.