I rode my two bikes this week, one with a Ryet 3D printed carbon saddle and the other with a regular carbon padded saddle. It's been about 95 degrees (35 celsius) where I live so it's been quite hot. The regular carbon saddle in the beginning is more comfortable to sit on, but after an hour into the ride it gets less comfortable, you notice more friction as you move on the saddle and the padded material heats up from the sun making it quite hot. The 3D saddle feels less comfortable in the beginning, but the longer you ride the more your sit bone begins to adapt. Also the sun doesn't heat up the saddle as you're sitting, keeping your posterior quite cool.
I think I'm beginning to lean towards 3D printed saddles as the go-to saddle. Besides the slight weight penalty, at least for the conditions I ride in, the benefits outweigh the cons.