There's two types of humans you can take over in the game.
The light guard with a rifle should be able to outrun any of the enemies easily, while the bigger heavy guard with an lmg moves a lot slower because he's just a lot tankier, and has way more DPS with the lmg.
Honestly though I think I could've made the ai a bit slower, and also get a bigger map so you don't just run into the enemies right after you outrun them.
Anyways thanks for the kind words and the detailed comment.