I have seen this argument in many forums lately and I must admit that I had not put very much thought into the topic until reading these comments. The dispute is that these two phrases cannot be used interchangeably.
The argument on the other side is that they are practically the same thing. But they are not.
Power exchange involves one partner giving up power to the other. Simple, right.
Well, role reversal implies that the partner that is supposed to be, or usually is, dominant is acting in a submissive role. The offense comes when it is interpreted, in the FemDom sense, that the woman is submissive by default. In this way, the only way for a woman to be dominant would be through a role reversal. And that she cannot be naturally dominant.
Previously I would use neither phrase to describe a relationship, but if I did use one of them, I would use power exchange. I did not, however, mind reading a sentence where the other was used because it never occurred to me what it was implying. I would not be offended and I suppose that I still will not.
But it obviously matters to someone, so I thought that I should help them out a little.
–Miss Ari ^_^