Its like the same difference. If its different, how can it be the same? (Except perhaps,in a math problem... 5 = 10-5 = 20-15, but that is math.)
Some parts of Kansas are not particularly flat. It has rolling hills until you pass the flint hills. There are parts in the south and center that are Pretty Flat. The whole state tilts up toward Colorado so we are more of a sloping incline containing wheat, cows, oil, salt, helium, and Kansans.
I drove from Texas to Colorado via Kansas. They call Denver the mile high city. I guess that makes the western border of Kansas three quarters of a mile high.