I just got the new Riptide with Ipilot and it is amazing. I will never go back to a manual trolling motor again. It was hard to find a lot of detailed info on the ipilot vs copilot features. Here is a link to a very thorough review on it:
http://floridafishingtv.net/minn-kota-ipilot-reviews-minn-kota-trolling-motor-ipilot-vs-copilot/