[Q] Difference in N910F models topic

Hi,
Can anyone tell me if there's a significant difference between the SM-N910FZKEDBT and the SM-N910FZWEDBT? I know they are both Snapdragon but I dont know if they have a difference in bands. They are both N910F but there is a 1 letter difference.

There is also another one, SM-N910FZKEXEH

I would like to know because I'm in the process of buying one :D

Thanks in advance!!