I'm currently using Ihost, but have the option to switch to WHM Auto Pilot. Should I? If so, why?

there is a free version of whmap

give it a try

WHMAutoPilot more advanced software surely. But there are a lot of alternatives to WHMAutoPilot, too such as WHMCS, AWBS, Clientexec, Modernbill... etc. Try the demos and decide which you choose yourself.