IIRC, males are basically worth 3x as much as females exp-wise. But every now and then, (non-event) gold+ females get the same exp boost, so you can compare them as such then.

At this point though, if you want to get rid of gold+ males, you should just sell them for rainbow crystals instead. For the most part, you'll be getting your exp from tin cans or unwanted plat event units instead.