It may be that the entire window/viewscreen discussion is null and void... Can it be that a window also doubles as a viewscreen?
Sometimes it seems to me that the nuEnterprise's bridge uses something like a HUD. In the photo I mentioned in an earlier post (the publicity shot with McCoy and the others standing in front of what seems to be a window), you not only have a view outside, but the speed of the starship ('warp factor such-and-such') superimposed onto it. Also, in another photo, the film.com exclusive with Nero on the big screen and Kirk and Spock standing in front of him (sorry I don't have the URL), it looks like you see not only Nero, but also some kind of nebula behind him, just as if his transmission was somehow projected onto the window.
Sometimes it seems to me that the nuEnterprise's bridge uses something like a HUD. In the photo I mentioned in an earlier post (the publicity shot with McCoy and the others standing in front of what seems to be a window), you not only have a view outside, but the speed of the starship ('warp factor such-and-such') superimposed onto it. Also, in another photo, the film.com exclusive with Nero on the big screen and Kirk and Spock standing in front of him (sorry I don't have the URL), it looks like you see not only Nero, but also some kind of nebula behind him, just as if his transmission was somehow projected onto the window.

M'Sharak thank you for the Advice,(and link) did not mean to cause trouble.
But I suppose it makes some sense that some earlier vessels might use less sophisticated and efficient warp propulsion technology and require bigger, less advanced warp coils in order to achieve light speed and beyond. Which makes mid-and-late 23rd century ships like the Enterprise an evolutionary jump.