I dunno how anyone can think this, but it's not worth debating really, they're both crap. To me Obertan is just void of anything ever, at least with Gouffran he had an okay start and puts in the occasional grafter's performance.
That Gouffran had a decent start here doesn't have any relevance to how shit he is now. Gouffran also gave up putting in grafter's performances a long time ago. Obertan set up 1 of our 2 goals this season. They're both shit but Gouffran never does anything half decent, Obertan occasionally does something decent