Prometheus is said to be 414m long with 15 decks. Voyager is 344m long and also 15 decks.
I mostly go with Sternbach's sketches because they better match to the stated size. And I think the dips on the saucers top and edge make it look rather dented. So I initially decided to not go this way but try to achive a clean look that will mix elements of the Intrepid and Sovereign class.
The windows were not that time consuming. It's a simple shader with displaced tiles masked by a ramp to get them in line. Then baked to the texture.
I even built a procedural shader for the whole hull paneling. But as Redshift's native C4D shader support is still in its infancy, and for better sharing they come on textures, too.