The neck shape on the Highway One will be pretty similar but not identical.
I think they started calling the neck a "Modern C" shape in 2000, when they discontinued the American Standard Series and started the American Series, before that (I think) they were just calling it a C shape.
I had one of those 1994 40th anniversary Strats, and a couple of other mid-90s ones. The newer Modern C shape seems a little more rounded to me, the '90s ones were a bit flatter on the back and sharper at the edges. But the depth was about the same.