Some better pics, as promised:
Vivacious (C-Shock) v. Fun 'n Sexy
Fun 'n Sexy v. Rocking Chick (Barbie)
From top: Fun n' Sexy, Vivacious, Rocking Chick
As you can see, Fun n' Sexy is very similar to Vivacious, but with blue reflects. Rocking Chick is a little darker, and a little bit more fuschia.
Totally It! v. Mallibu Barbie (Barbie)
Once again, they're very similar, but Totally It! has more obvious blue reflects.
High Top
My Fafinette doll, chillin on my windowsill