There is UNP and CBBE
UNP is higher poly, and more realistic. CBBE is more curvy/fantasy, and the author has made sure it is 100x more cutomizable than UNP thanks to bodyslide/outfit studio etc…
UNP has better armors/clothing mods that are made specifically for it, most of the good CBBE stuff gets ported over to UNP.
I use…
Diffuse
femalehead.dds <- Mature skin
femalebody_1.dds <- Mature skin
femalehands_1.dds <- Mature skin
Normal maps
femalehead_msn.dds <- Women of Skyrim
femalebody_1_msn.dds <- Women of Skyrim
femalehands_1_msn.dds <- Mature skin
Specular maps
femalehead_s.dds <- XCE
femalebody_1_s.dds <- XCE
femalehands_1_s.dds <- XCE
Subsurface maps
femalehead_sk.dds <- No more ugly bronze shine
femalebody_1_sk.dds <- No more ugly bronze shine
femalehands_1_sk.dds <- No more ugly bronze shine