We have a tie between Gremlins and Yogi. Yogi's First Christmas is nothing great, but I don't consider Gremlins to be a Xmas movie, so I'll break the tie for Yogi.
Next,
It's A Wonderful Life vs. Silent Night, Deadly Night
Santa Claus Is Comin' To Town vs. How The Grinch Stole Christmas! (live action)