And just to expound on m-dynamics answer, the answer to your questions is "yes". It would be normal.

There will be a difference in a NURBS model of such great complexity, and what you are used to with C4d as a poly app. That equation wont be equal.

So with the NURBS model, you will want to take the steps of "Lighten the viewport load", which is what m-dynamics has pointed out, and also "scene managment", with hiding things that dont need to be diplayed at a particular time.

When you go to export, you may need to export it out in "parts" also..... (Plan for this)

Wicked ship and detail, BTW.