I think this ship was made incorrectly.
I would think it should have a single (bomb) upgrade icon and a single (crew) upgrade icon on all models.
Perhaps some of you pricing experts could weigh in with how much that might add to each model.
This is a ground support fighter that is, according to the "Rogue One Ultimate Visual Guide", 'more speeder than fighter'.
It was developed because standard TIEs don't do very well when asked to fly in atmosphere instead of space. The TIE/sk only has a higher atmospheric speed than the TIE/ln: I would assume in space the Striker loses it's appeal.
It got me thinking a bit: maybe it would be cool to have 2 dials (space and atmosphere) for the TIEs. Likely many Rebel craft would be equally good in either environment.
Furthermore, the adaptive ailerons feature might only apply inside an atmosphere (the Striker's wings have extra repulsorlift coils in them, which would seem to be most effective near the ground).
Best of all, this space/atmosphere split might make for good integration into a ground component to this game (starfighters have to shoot AT-ATs soon in this game!)