Davydenko has more titles (21 to 11), more prize money, more years ended in the top 5, an extra MS title, and a Davis Cup title to his name. Nalbandian has the slam final.
To me it looks like Davydenko takes this on career achievements. Note, this is not who I think is the most talented, this is who I see being the most accomplished. David is one of the great underachievers of this generation.
That's also a fair argument. Thanks, I forgot about that
. Because like you said, on the other hand Davydenko's got way more titles than him and he's got higher ranked finishes to seasons. He's also way more consistent (but that role has switched recently). So yeah, without the slam final, Davydenko is easily the better player.