As for if it is a Connie refit... I believe the Ent-A became a museum piece (can't remember where I heard that, could be from a book in which case not canon), I'm pretty sure Connie's were retired at the start of the 24th century, they could have dragged one out of mothballs, in which case, there is a chance it's the Ent-A, but could well be any other Connie that got retired rather than destroyed. There's nothing on screen to suggest it either way.[/quote]
I believe that Shatner wrote a novella about the Enterprise A being sold/given to some distant planet.
Still to get rid of such a historical ship in that way almost amounts to her being sold for scrap. Not an ending befitting her prior history.