I get asked this often by customers so thought this might help
https://support.beyerdynamic.com/hc/en-us/sections/200272172-DT-770-edition-DT-880-edition-and-DT-990-edition
As far as I am aware there is actually no such thing as a DTXXX Premium, this is in fact an Edition model.
As an aside C-plan Audio has some Edition models at old exchange rate pricing so worth snapping up whilst available.
https://support.beyerdynamic.com/hc/en-us/sections/200272172-DT-770-edition-DT-880-edition-and-DT-990-edition
As far as I am aware there is actually no such thing as a DTXXX Premium, this is in fact an Edition model.
As an aside C-plan Audio has some Edition models at old exchange rate pricing so worth snapping up whilst available.