I´m not a SS expert but I noticed something in Mike´s comparison pic: notice the slight "waves" in the upper middle coolshade triangle on the starboard wing. I don´t think whoever would try to replicate this TIE would be able to exactly match those irregularities in the same place.
Also the distortions in the coolshade around the damage match exactly.
If it is the original it must have been slightly modified, as Julien says, maybe the wing was rotated, but also the broken wingstar strut has a much sharper bend in the bluescreen pic. Maybe they bent it back a bit?