From a "Best Practices" perspective, is it better UX design to ask 1 question with a set of 4 radio buttons, 2 questions with a set of 2 radio buttons each, or is this really just splitting hairs?  

To provide some context, a specific scenario would include:


1 Question 4 Radio Button Approach:  
Question:  Would you like to include graphs in your report?  
Answer 1:  Yes, and I have some specific indices and medians in mind...  
Answer 2:  Yes, but just give me the basics...  
Answer 3:  No, but I would like some specific indices and medians for the performance   charts...  
Answer 4:  No, lets keep it simple. Just the basics for the performance charts...

2 Question 2 Radio Button Approach:   
Question 1:  Would you like to include graphs in your report?  
Answer 1:  Yes  
Answer 2:  No  
Question 2:  Would you like to choose specific indices or medians for your report?  
Answer 1:  Yes  
Answer 2:  No