Then what is the sense of even naming the car Spec-B? Especially since the only difference is the shocks? Then anyone can make a spec-B out of their GT as the engine is totally the same..... right?
Not entirely.......but they can make it look like one.
monk_t is right. There is little difference between most Spec B's and standard GT's (unlike what some folks would have you believe), other than a few trim options (like 18" rims), and gearing variations.
The GT's can come with yellow Bilsteins. I've seen regular sedan GT's with them. The difference with the Spec B, (subject to correction), is that the struts are ADJUSTABLE on this variant, along with a few other minor changes. Power between the models is about the same also, as the engine is practically identical.
That's about it. The Spec-
B denomination has nothing to do with Bilstein struts, but in fact started off in a similar fashion to how the Impreza has it's "Spec
C" variant.
In a similar vein, just as Subaru has the Impreza
S204 (limited edition-only 400 or so units), they recently released the Legacy
S402 (again...limited edition....400 or so units). The Legacy is a serious performance enhancement over the std. GT/Spec B (just as the S204 is superior to a "std" STi), so the naming philosophy, is clearly similar.