"Aphrodites vs. Vstrings vs. Tangos: the New Queens of Prim Breasts?" is a great article comparing (and contrasting, as my English teacher would say) the three breast attachments of the title. It's informative and thorough, and the nice part is that Ms. Melgund doesn't have a horse in that race; she supports them all and has no ax to grind, though at the end she does get up on the soapbox about the issues of adapting clothing to breast attachments. It's not trivial, she convincingly argues, UV map compatibility or no. Please do give it a look.