Kendall Jenner And Kourtney Kardashian Step Out In The Snow In Thong Bikinis [PHOTOS]

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Photo credit Jayne Kamin-Oncea-USA TODAY Sports

If you have a brother or sister then you know all about a good sibling rivalry.

It appears that Kendall Jenner and her sister Kourtney Kardashian might have a little Instagram rivalry -- and thank God for that.

Kendall posted a photo posing in a very small bikini while hanging out in the snow. 

That photo was posted at 5:43 p.m. on December 29.

A day later, Kourtney posted a very similar set of photos but hers was even more revealing as she showed off her thong bikini.

A post shared by Kourtney Kardashian (@kourtneykardash) on Dec 30, 2018 at 8:42am PST

Well, maybe it isn't really a rivalry as Kourtney did caption her photo, "Copied Kendall."

Kourtney got 4.4 million likes, Kendall received 7.4 million likes. Looks like Kendall won the competition.