Mata by an absolute fecking mile.
Some of the joke responses in this thread only seek to reinforce my view that the expectations of Fellaini have been and continue to be low.
The only person being insulted here is - bizarrely - Fellaini himself. Expecting sod all (or to pass the ball in a straight line) is an insult to the considerable (yes, considerable) talent he has.
Mata has scored more, started more, assisted more and objectively proven to be the better player during their time here. It shouldn’t even be up for debate.
Why would you need such a view reinforced? Fellaini came with far, far lower expectations that Mata. From the outset he was a player many of us didn't want anywhere near the club - contrast that to Mata, coming from Chelsea as one of the absolute stars of the league, what on earth else would you think the two would be compared as?
From the very start, Fellaini was a player who had to try and win over a fanbase who weren't convinced. Mata, everybody expected to be wowed by and he has got nowhere near that level of performance here and is often just dumped off to a position where his weaknesses are most made up for.
The third paragraph doesn't say much when you're comparing a forward to a midfielder - Mata not outscoring Fellaini would be a shambles, likewise for assists. I don't think you're being at all objective contrary to saying 'objectively' in your post, in fact, you're tilting to favour Mata by mentioning goals and assists. A 'better' player, absolutely nobody thinks Fellaini is a better footballer than Juan Mata, which actually weakens Mata's position further, because as the better player, he shouldn't even be compared to Fellaini unless Fellaini performed absolutely out of his skin to match the higher bar... or, Mata performed worse, to lower his own bar to be in line with the likes of Fellaini. One player was purchased for a club record fee for the very reason he was supposed to come here and be a star, the other, many baulked at the £25m price tag, and not just because Moyes ballsed up getting him for the lower fee with his dithering.
The only reason some are picking Fellaini is because he comes as a sub/plan B so his only goals/good moments come when we're desperate, whereas Mata has produced in those times as well as in general. Plus him being a bit shit adds to the underdog story and all that. Otherwise Mata contributes more in terms of goal, assists and his general play is better. It's not even close.
Well no, that's patently false and a reductionist way to enter a discussion. Whether you like him or not (I don't), Fellaini is a player who has given the opposition far more to think about than Mata has in his time here, been utilised in many a donkeyish way as an important conduit we've utilised time and again and has enabled others to play. If you're going to be objective, you take that into account. If you're not, then you make your own view redundant.