Sport Case Distinction?

Is there a purpose why some Xbox One recreation instances say “Xbox One” on the prime, whereas different solely say “Xbox”? My son seen the distinction and I haven’t seen any rationalization. I’ve seen 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 seen that the Xbox emblem is stark white and isn’t reflective like people who say “Xbox One”. Can somebody resolve this thriller for my child?