Garmin has always been at the forefront of GPS technology, and I would love to have a Garmin for my RV too. If you're wondering between the Garmi 890 and 1090 like I am, this is for you: The Garmi 890 has a smaller screen size (7.87 4.82 0.79 inches) and is lighter. That's why it's about $200 more affordable. But for the Garmi 1090, you will experience an impressive 10-inch 1280800 pixel IPS display. It includes a custom RV routing system that considers the weight and dimensions of the motorhome to analyze and recommend the best possible RV route. In short, choosing between the Garmin RV 890 and RV 1090 depends on whether you prefer a smaller device or a GPS navigation device with a larger screen.