In Flames blows ass. The Greys, when Agalloch starts playing shitty modern rock like In Flames, then you can say "fuck Agalloch." And every Agalloch release is better than anything In Flames could do, even albums like The Jester Race have nothing on The Mantle. In Flames are really shitty melodic death too, Heartwork > Any In Flames.
(Edit: By the way The Greys, nothing against you, just I don't see much in In Flames, apart from maybe birthing(if a word) a genre with some really good bands, but they themselves don't do anyhtign for me.)