It looks like the neck was worked on while the nacelles complete with their pylons were detached and the new ones placed on, as well as the phaser units being changed over. The rest of the ship outside and in, looks to be the same.
When we see the new ship being built, there's a modular ethic going on, even finally seeing a bridge module being slotted in the way we always through they were.
When we see the new ship being built, there's a modular ethic going on, even finally seeing a bridge module being slotted in the way we always through they were.