Board Thread:General Discussion/@comment-25356210-20161227000312/@comment-26347028-20161227134750

As a general rule, while tanks can often deal with fairly rough terrain, the reason no animals have wheels is that legs function better in almost every environment that isn't flat. Therefore, mech suits are basically just a smaller version of walkers. They only need to contain humans to give the pilots an illusion of relevancy, as they really don't need to be piloted by a human.

Therefore, the last two are basically the same, type of vehicle, and designed for being invulnerable to rougher terrain that would probably immobilise a tank.