Difference between "asked" and "were to ask" in conditional sentences?

What is the difference in the meanings of the following sentences:

1. 
   

   
   

   If you asked me, I would say no.

   
   

   
   


2. 
   
   

   
   

   If you were to ask me, I would say no.

   
   

   
   

I know that these sentences express imagination of the speaker. But they look similar to me. I don't know which one is correct to use depending on the different context. Which sentence expresses more possibility of your asking ? I think that 'were to' could also express the meaning 'by chance' or happen to' for example:
1."If you were to ask me (If you happened to ask me or by chance) I would say no."
Am I correct here ?

My question is about difference between these two sentences and which one is correct to use depending on different context. I'm expecting an helpfull answer. Thank you very much in advance.