If you are reading the review there could be two possibilities
You are trying to compare an android tablet with iPad and trying to find out which one to buy
You are confused if you should pay a little extra for the retina display
I went through the same thoughts and here is my view
Apple v/s Android device is an age old comparison.You will get a cheaper android device in comparison to apple device, and the obvious reason is the right reason for the price difference. QUALITY, Display and UX. If you can afford it, just do not think and go for iPad
I considered if its worth paying a few thousand Rs extra for the retina display and I felt it was a good idea that I did. I would not have been unhappy with the IPS display. Retina display has certain excellence in viewing and I would say that is one thing you will always do when you are using it, so it makes sense to put a few thou extra.