What is the difference between the two in the Batman set

There is a lot of info. I would suggest reading the vehicle cards. all the info is there

http://heroclix.com/wp-content/uploa..._PilotMute.jpg

Basically, if its polited, you need a pilot to give it actions(or it takes a click when you do give it an action). On Autopilot you dont need a pilot to drive it.

That and each dial is different, so powers/stats change.

Read the rules for each vehicle as they all have little changes between each dial.