Its a Ford, Chevy, Dodge debate. Both companies make fantastic units. On the HB's the 800, 900 and 1100 series units are basically the same just a bigger screen as you go up in series. I personally run a 898 and love it. If I were buying again I'd go with the biggest screen that my budget would allow. Menus are easy to navigate and use. As with either unit the better you are at "dialing them in" the better picture you are going to get. I also like the fact that Humminbird, Minn Kota and Lakemaster are all owned under one parent company. I see great things happening in the future.
There are a couple site sponsors on here that sell both units at prices way better than you'll find see from the big stores.