Good comparison, Praetor. One thing though:
The alignment of the window rows on this Excelsior model's secondary hull are not quite right. Look at this:
The number of window rows there is the same, but there is a space between the 2. from the top and the 3. that is as high as between the 3. and the 5. row. So there should be another deck between them, meaning the secondary hull has one more deck than on the model you used.
There is also a higher space between the lowermost window row and the darker part of the hull.