The Firefly is closest to what you are riding in terms of shape, cut-out & padding, biggest difference being that it is narrower than the Butterfly. So if you are happy with the Butterfly other than the width, the Firefly might be a good bet.

The Damselfly is much, much narrower. Unless you have very narrow sitbones, you might fall off of that one. Because the whole saddle is so narrow, the cut-out is also very narrow. I had the same experience as Emily with the cut-out can folding in on soft tissue & pinching me raw. I know some racers who like that saddle a lot, but I couldn't deal with the cut-out.

The Xero is the same width as the Butterfly, so it might be too wide for you again. Unless you go with the men's version. It is much, much harder than the Butterfly. The shell is different, and the padding. So it will feel like sitting on a rock in comparison with your Butterfly.