It really is no competition between the two movies, one is a late night soap executed by an immensely talented cast and crew while the other is probably something you've never watched before and with a plot that is leagues above Gone Girl.
I'm so happy about Gyllenhaal, given the trend in his choice of roles the last couple years I think he's just about to enter his peak. Seriously, aside from Love and Other Drugs and Prince of Persia I can't think of many films he's been in that I didn't enjoy immensely.
Jarhead, Zodiac, End of Watch, Nightcrawler, Source Code, Brokeback Mountain, Donnie Darko...good stuff. I think his performance in Nightcrawler is worthy of Oscar buzz.
Given that he's more than willing to drop a few pounds and shed his pretty boy status in change of a grizzled one, someone needs to get him a season on True Detective.