It looks to me like they've made a higher-detail version of the window housing for the zoom-in. Not sure if they've altered the size.
Top pic from the end of XI, second when they're at the edge of the neutral zone in ID, last when they're falling to Earth.
Here's a rough idea about the position of the bridge:
I've got the bridge and turbolift plaza each at 40' across (on a 2380' Enterprise), which is pure guesswork.
And here's the clip of Kirk in the "turbolift plaza":