I'm pretty sure we did a study on the differences in the SD and SSD bridges a few years ago, but it really boils down to the tower being blue in 80/97. It's a giveaway.Tobar said:
Are you 100% certain it's the Executor in that opening shot? I always interpreted it as look at how massive the bottom of this bridge section is, then cut to the entire star destroyer to show the scale of the rest of the ship which is then engulfed in the shadow of an even bigger ship that dwarfs the already massive star destroyer in size. The whole thing being a play on the opening of the original Star Wars.
JEDIT: We apparently didn't compare the bridge modules, because the one in this shot is the same as the one the Falcon attaches to. So it boils down to the color then.