Duke it out with the Duchess! Naomi Watts and Kate Middleton both looked stunning and sweet in the same white dress by Zimmermann -- but the Duchess of Cambridge slightly tweaked her overall look with classic accessories at the prestigious Sydney Royal Easter Show on Good Friday, April 18.

Rocking identical white, three-quarter-sleeve eyelet dresses by the Australian label, Watts and Middleton's accessories and hairstyles made all the difference in their overall looks.

The Duchess, 32, opted for a nice silver wristwatch on her left arm, which called attention to her sparkling engagement ring. She paired the spring-appropriate outfit with simple pearl drop earrings, and left her straight brunette tresses down.

Watts, 45, looked flawless in the white lace dress for her Jacobs Creek Wine ad campaign. In a campaign pic from the libations brand, Watts nurses a glass of white wine while surrounded by gorgeous vineyards. The photo of the British-Aussie star was taken in the Barossa Valley, one of the Australia's oldest wine regions. The star looks more casual than the Duchess, with a brown leather bracelet on her wrist and her blonde locks styled into beachy waves.

What's most interesting about this fashion face-off is Watts' role as the late Princess Diana in the 2013 biopic, Diana.

Who wore the look best: Kate Middleton or Naomi Watts? Vote now!

Poll

Who Wore It Best: Kate Middleton or Naomi Watts?

Kate
Naomi
6366 Total Votes
Who Wore It Best: Kate Middleton or Naomi Watts?