I have done more null-testing in my life than any moderator and nobody does it better than me.
(Sorry, couldn’t resist) 
No, really. I am not going to test anything. Been there, done that, bought a dozen T-Shirts.
Simply because there is no difference between Nuendo & Cubase.
It’s the same application. They are Identical, except for the extra features that Nuendo has.
The “engine” is exactly the same.
Fredo