I dont think you can compare a natural birth with one with an epidural thoughthe one without anaesthetic is obviously going to be quite a bit more painful.
No, you can't compare them because no two individuals are going to have the same pain threshold. And no the one without anaesthetic is NOT obviously going to be more painful.
I know plenty of women who have said that their drug-free births were intense, but not painful. I've met one such woman who said that she experienced an orgasm during delivery, and no pain.
I had epidurals for both of my back labours and still had very very intense deliveries. Many women I know who have had similar labours have shared that same sentiment: if the epidural was doing something at the end, you could have fooled me.
It is very much based on the individual's experience.
That's why I don't think it's appropriate to suggest that those of us who have had pain meds during birth don't have anything to add to this discussion. That's unfair, inaccurate, and pretty far from the inclusive spirit that BnB tries to foster.