After seeing a recent poll, I decided to check this out: "What is the least expensive and most popular fruit?" 

 According to what I found--it's probably the Banana. I know for a fact that bananas are less expensive than apples, at least in my area! Those were the two answers people gave in this Poll. I eat both; bananas have more fiber & potassium, which is why I choose them.  I also eat apples, but due to a medical condition, I must peel them first--which negates some of their good points.

Anyway, it's up to each person to decide which they prefer. Both are nutritious and good for you.