i dont think that the guitar defines the style but usually the style will define the guitar mainly because people will see oh wow alexi laiho, kirk hammett and james hetfeild play ESP guitars they must be heavy as Sh*t, or satriani and vai play Ibanez petrucci used to for a long time, those must be some quite virtuosic sounding guitars.
I think thats why everyone shreds neoclassical on a strat now, because of malmsteen.

But yea my point is most guitars have been stereotyped for certain genres. If it weren't for outside influence, you probably wouldnt be convinced to use a certain guitar for a certain style