Sport Case Distinction?

Is there a purpose why some Xbox One recreation circumstances say “Xbox One” on the high, whereas different solely say “Xbox”? My son observed the distinction and I haven’t seen any clarification. I’ve observed his copy of Bioshock The Assortment solely says Xbox on the header, the place as all of his different Xbox video games say Xbox One. Additionally, one the one which simply says “Xbox”, I observed that the Xbox emblem is stark white and isn’t reflective like people who say “Xbox One”. Can somebody remedy this thriller for my child?