I think you are right about the sal that you labeled as female. I'm not a 100% sure about the male though. Do you have any other photos of him/her? Also, yes that looks like a FM to me.
My bad on the FM, I thought you were trying to verify that it was not another type of Thorichthys. FMs are kind of hard to sex as near as I can tell. The males sometimes have a bit of a nauchal hump and longer streamers on their fins. If I had to take a guess at yours I would say female. That is just a wild guess though.
Good luck sexing that FM w/o venting