Either one you could afford would work great. Pictures are going to be pretty close in comparison to each other. Only con is with Garmin in that range all you get is a basic map. But you can still mark way points and if not mistaken you can add them manually. On Humminbird you can use the Navionics or Lakemaster map cards. Personally I prefer the lakemaster if your lake or lakes are covered. For what you are spending I’d pick the cheapest for comprobale screen size. Don’t think you would be disappointed with either.
Proud Member of Team Geezer
Charlie Weaver USN/ENC 1965-1979