Brother, there are actually some categories of phones. On the basis of which numbering is done , such as A, B and C categories. IPhone , Samsung , Blackberry, these are A category phones , Walton , Xiaomi , Oppo , these are B category phones , there are many more category phones. The quality of A category and the quality of B category but not one. A to B is a little inferior. So even if everything is the same, the price varies a bit. I hope I understand.