[Gwathagor]

Here's the first difference between Turin and Achilles that comes to my mind: the issue of the characters' fates is crucial in both stories, but in the case of Achilles, there seems to be more of a conscious choosing of one path over the other, whereas I don't think the choice is ever quite as clear to Turin. My impression is that he is more chased and haunted by his fate and he doesn't face it in quite the same way as Achilles.