Just to be curious, I looked up videos of each unit. Here is the one I watched from the deeper, and there are more available if you look. It appears there are more features on the Deeper menus to adjust and then possibly get better resolution. The Deeper also has three spots to connect a line or connector rod for different fishing modes (kayak, boat, shore, bridge, etc). I think both lose/interrupt signal when water covers them, so a slow retrieve is necessary. I'm wondering if heavy waves would give a lousy return with the waves going over the top all the time? I'd say if a large percentage of your fishing is from a kayak, then maybe I'd advise a decent portable unit from H'bird, Low, etc. so you could use it on the kayak or for ice fishing. If you bank fish a lot then one of these units might be a good idea. Good luck with whatever you choose