What is the difference between:
1. Design of a system vs. System Design
2. Type of cable vs. Cable type
3. Certificate of Compliance vs. Compliance Certificate
4. Obligations and Duties of Company vs. Company's Obligations and Duties
There is no difference, except when one form or the other has an idiomatic significance (e.g. "king of the hill" versus "hill king").
The way I see it is that the difference is where the emphasis lies.
To use your example 1, I would say the emphasis of Design of a system lies on the System, while in System Design the emphasis lies more on Design.
The latter could also be car design or airport design while the former would signify the design of a specific System for specific needs.
In that scenario the most important is the system itself, and not the the design that went into it (however impressive the design might be.)
It's an interesting question and I certainly hope more people post answers.
In any case I hope this helps,