So I LOVE Cait. and I love Curie. But I love Cait more.....as her personality just suits my character better. I hope I don't offend anyone with this post as I really AM NOT a Male-Chauvinist Pig! But having said that I am about to have a detailed examination of their physical beauty as I see it.
I use this clothing mod replacer for Cait:
http://www.nexusmods.com/fallout4/mods/3981/?
And I have my Curie in a new Vault 111 suit and this mod:
http://www.nexusmods.com/fallout4/mods/4908/?
I think Curie looks PERFECT as suited above. I mean va-va-voom 10 out of 10 perfect. I also give her eyeglasses and the Military Beret.
When I put this outfit on Cait she looks TOO SKINNY. Her butt IMHO is too small/flat when wearing the 111 suit. I once put Piper in the black BOS Officer's Uniform and she also looked drop-dead perfect (looks much like Marvel's Black Widow). When I put Cait in the same outfit she looks like a malnourished anorexic model! So far the only thing I've found for poor Cait to wear and look great in is the modded corset. And in that I think that she does look fantastic. Coming from an 850+ hour Skyrim player I would have expected Bethesda to use the same body models for all female companions but it's obvious from this that they are NOT! Although come to think about it Beth DID use a more petite body model for Seranna than they did for Lydia and company.