I think the blueprints are for both. Since all the model parts where scaled up to build the SS, it would make sense to draw up one set of plans that could be used for both the miniature and the full scale. What better way to make sure they two are identical? The plans are drawn at 1 1/2"=1', which is half of Studio Scale, but it is dimensioned for the full scale.
I used the model parts and scaled them up to match the size of the original blueprints, and they are pretty darn close when it comes to proportions and detail.