One thing to recognize is the sitz bones or ischial tuberosity is like a V shape rear to front. Wider in the rear and narrower in the front. In a more upright position, many riders will prefer a wider saddle whereas in a more aero position, the same rider might prefer a narrower saddle and different shape. On my slightly more upright randonneuring bike, I prefer my B17 Special (175 mm wide IIRC) and with a slightly more aero bike, I prefer the Berthoud Aravis (157 mm IIRC). I think my racing bike saddle is more like 148 mm. Basically, position on the bike can matter a lot in terms of saddle comfort (racing bike position vs upright position), what works on one bike won't be optimal on another.