Interesting concept, but it would have had to be a lot longer than 300m to (comfortably) carry 950 people.
Really the only usable space is the forward pod, and that looks to be about a third the size of the Constitution-Class Enterprise's secondary hull at that scale.
I kind of figured this was a concept for a warp drive demonstrator that was based on reverse-engineers Vulcan tech instead of Earth-style warp nacelles (as seen on Phoenix).
Maybe it was built (or at least started), and was supposed to be named Enterprise, but never entered service for some reason.
Does beg the question – if Enterprise had gone a little longer, would they finally have embraced the idea of Enterprise taking place in an altered timeline (possibly with Star Trek First Contact as a point of divergence)? Maybe somehow Picard fixed their timeline, but in the process gave rise to other quantum universes.
I would have welcomed that
Enterprise could have done a lot more if they had not been constrained to the limits imposed by TOS.
In the 'Prime' timeline, NX-01 was never built, and Federation tech stagnated for decades as Earth assumed the Vulcan way of doing things was superior. Eventually, things got rolling again, with the Vulcans being more interested in purely intellectual pursuits, leaving the nasty business of defending the Federation mostly to Earth.
In the alternate (Enterprise) timeline, Cochrane knew there were big threats waiting out there, and knew Earth needed to get moving on Warp technology as fast as possible, with or without the Vulcans.