I really hate it when people put arguments in my mouth, just to make that clear. So if you feel that I've done that, my apologies.
But in my opinion, there were grounds for both statements, because 1) you intensified your activity in this thread post-Bayern and 2) when you say something like "Vidal didn't need help (meaning: to score all of those goals)", you are insinuating that he is a better goalscorer than Matri. And to me, the only way such an argument would be of any relevance, would be if you compared them as strikers. Because playing as a midfielder and a striker is so completely different.
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To compare two players' attributes, they have to play in the same position.
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To that, there is only this to say: Why doesn't Vidal play as a striker then?