In my mind if budget allows I would get the echo map in largest screen you can afford. I would go that route because of the map side. The Stryker just has a base map with no contour lines or land markings. It just allows you to mark way points and return to them. Where echo map has good charts. As far as finding spots to fish and finding fish don't think you would find a great deal of difference in quality of picture. I don't run Garmin but they are dang good units especially for the money. If your not into spending a ton of money on the latest greatest gadgets to go with them I'd get the 93sv plus. Some really good buys out there right now.
Proud Member of Team Geezer
Charlie Weaver USN/ENC 1965-1979