Which of these should I wear to an interview?

I can’t decide which of these two outfits I should wear to an interview that is coming up in a few days. I could wear a formal black dress with a high neckline under a suit or a white button down (buttoned neatly of course) with a black pencil skirt and a matching coloured suit. Which would you suggest?
Conservative Dress + Suit
Button Down Shirt + Skirt + Suit
Select gender and age to cast your vote:
Which of these should I wear to an interview?
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