Originally Posted by
Deadpool
Here's the thing about the Bryan Ferry cover: its purpose goes beyond that of just covering a song for fun and/or tribute, like say NIN's "Get Down Make Love." Covering "Is Your Love Strong Enough?" was a.) Fincher's idea (not the band's), and b.) recorded specifically for a movie - and no doubt always intended for the end titles.
Does it deviate from Brian Ferry's original? Not too much, no, but let's not forget that Fincher has a producer credit on the song. I'm sure he wanted it to be relatively faithful - more of an update than a re-imagining.