Who wore Zac Posen better?

Both Nicole Richie and Cynthia Nixon have stepped out in the lovely blue dress from Zac Posen's spring 2008 ready-to-wear collection.
Cynthia Nixon was spotted wearing this floor lenght gown on the set of "Sex and the city:the movie".
Miss Richie wore the same dress to the the Montblanc charity cocktail, on March 6, 2010.
I adore this dress on Nicole as I think she looks so elegant in royal blue.
What do you think?

poll by twiigs.com

In Nicole's closet: Judith Leiber

Nicole Richie looked stunning on the red carpet at the 2010 Oscars, on Sunday, March 7, at the Kodak Theatre.
Miss Richie chose a sequined Reem Acra gown with a very low sexy back.
The style icon paired her dress with a Judith Leiber jewel toned "Chocolate bar" clutch.
This rectangular minaudiere is inlaid with faceted crystals and has a 19" chain
It can be purchased here for $2,795.
Simone Harouche, Nicole's stylist, completed the outfit with Lorraine Schwartz diamond stud earrings in blackened platinum and a Lorraine Schwartz cocktail ring.

Nicole at Elton John's annual Oscar party

Nicole Richie was all smiles at Elton John's annual AIDS Foundation party at the Pacific Design Center, on March 7.
Looking fabulous in her Reem Acra gown, Miss Richie posed with her celebrity friends - Kelly Osbourne, Miley Cyrus, Hayden Panettiere or Rachel Zoe, while her fiance, Joel Madden, was busy doing his thing as the official DJ of this grand event.