With dress it better for my works Christmas party?

I've changed my mind on my dress for the Christmas party and ordered these two to choose from as I think they are classier and more appropriate for my work.

I work for a event tech company and we have very glamorous party's at 5 star hotels and I always like to be the best dressed every year.
With dress it better for my works Christmas party?
Dress 1
Vote A
With dress it better for my works Christmas party?
Dress 2
Vote B
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With dress it better for my works Christmas party?
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