This is a video of offline gameplay on the Capture the Flag map "Facing Worlds".
Facing Worlds - Two large towers stand on a spinning asteroid with a deadly no-man's land between.

The first half of the video is against the AI at the skilled difficulty (4th easiest difficulty), and the second half is against AI at the adept difficulty (4th hardest difficulty).  The difference is noticeable.

After the adept difficulty, it's like the bots get exponentially harder until you reach the hardest, Godlike.  Unless your aiming skills rival that of an aimbot and your dodging skills rival that of a ninja, you'll have a tough time.  Which is to say I get destroyed.