Every year or so there is at least one pair of competing films that follow a very close premise. Some examples are: 1998's Antz and A Bug's Life, 2006's The Illusionist and the Prestige and 2012's Snow White and the Huntsman and Mirror, Mirror.
Well, 2014 (both made in 2013) is the year of the Doppelgänger:
The Double (2013)
Director: Richard Ayoade
Principal Cast: Jesse Eisenberg, Mia Wasikowska, Chris O'Dowd, Sally Hawkins, Craig Roberts, Paddy Considine, Noah Taylor, Yasmin Paige
In this comedic thriller a man (Eisenberg) is driven insane by the appearance of his doppelgänger. Directed by Richard Ayoade, Moss of the IT Crowd and director of Indie hit Submarine, this should be good.
The Enemy (2013)
Director: Denis Villeneuve
Principal Cast: Jake Gyllenhaal, Mélanie Laurent, Isabella Rosselini, Sarah Gadon
In this thriller a man seeks out his doppelgänger after spotting him in a movie. This looks really good…