It does appear similar. What I understand is that questions asked in answer section should be of those type for which we face difficulty in getting answer elsewhere. It might be about issues related to the sites or about technical knowledge about anything and so on. 

True, there is more scoe for discussion on forum whereas it is a limited option on the question and answer section

Answer section I noticed it today and second reason may be due to huge data admin divide it in two section to maintain speed of website but its good action and it may be like expert answer section.

The main difference in between forums and answers is that you can answer once in answer section (for points) but in forums you get points for all comments.

What I thought to write was already written by @suni51. Basically, in Q and A section we cannot have debate among all the users. It's only one time affair and so one needs to answer very thoughtfully.