Saucer edge slope, window arrangement and general detailing. While it might not be a pearlescent white in colour the saucer does feature aztecing.What do you see in it?
It doesn't appear gleaming, white and pearlescent to me. In STO, players see TMP-era ships alongside regular ships all the time. The TMP-era ones stand out like beacons. I don't see it here with the Nebula class. I might be oblivious, though.