The difference in the G2 "Vision" versus the regular G2 vision is a couple of small things. With the word vision in it, it adds a really cool three dimensional view of below the boat. You get what they call satellite imagery and Auto Guidance which is very helpful if you have a autopilot system on board. Auto guidance will create a route around an island all based on your minimum depth limits with one touch to the screen, otherwise, you would have to manually create your own route around that island. I have used it, and dont think I would go without that feature. G2 only gives the chart information and that is why it covers a much larger region. Hope this helps!