The iPad Air may be one of the biggest competitors to the iPad Mini with Retina display as they are nearly the same in every regard, except for size. I have only used the larger iPad models in the past, but am smitten by the smaller size in this iPad Mini and believe I will use it even more often.
You have likely heard the saying that the best camera is the one you have with you which is one reason I like to buy smartphones with good cameras. After using the iPad Mini with Retina display for over a week, I am starting to believe the best tablet may be the one that is always with you as well.
Most of these tablets are less expensive than the iPad Mini with Retina display, but Apple has never been known to undercut others in price and it is a premium product. I thoroughly enjoyed the and think it is the closest competitor to the iPad Mini with Retina display.