Kim Kardashian West, Kendall Jenner

247PapsTV/Splash News; AKM-GSI

It's a power suit showdown!

Kim Kardashian stepped out to dinner at Serafina in New York City last night dressed in an all-black getup underneath a tuxedo jacket with a neckline that was very, very low.

Kim's plunging V-neck top went almost down to her navel, giving her menswear-inspired outfit an extra dose of sex appeal. But Kim isn't the only one in the family to take the whole Diane Keaton-esque suit look and make it sexy.

Younger sister Kendall Jenner also stepped out in a plunging tux (sans bra) earlier this month. She showed up to her book signing with younger sister Kylie Jenner on June 3 in New York City wearing a sky blue tuxedo jacket, matching skinny pants and silver heels.

While Kim wore her black tux with voluminous, 1960s-inspired hair, Kendall Jenner went more modern and wore her hair pin-straight, parted starkly down the middle.

So which girl wore the better power suit: Kim or Kendall? Vote in the poll below!

Tune in to Keeping Up With the Kardashians Sunday nights at 9 p.m., only on E!

Tuxedo Showdown
Who wore the better plunging tuxedo?
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