Garmin dezl OTR620 vs OTR720: Truck GPS Buying Guide
By Beach Camera | Published: 2026-10-19
Category: Buying Guides
Compare the Garmin dezl OTR620 and OTR720 truck GPS navigators. Learn which screen size and features fit your rig, and get clear decision rules.
Quick answer
If you want a larger, easier-to-read display for long hauls, the Garmin dezl OTR720 is worth the extra cost. For a more budget-friendly option with the same core truck routing, the OTR620 delivers the essentials.
Screen size matters more than you think
The biggest difference between the OTR620 and OTR720 is the display: 6 inches versus 7 inches. That extra inch can make a real difference when you're glancing at the map while driving. A larger screen often means less zooming and panning, which helps you keep your eyes on the road longer.
Both units feature a bright touchscreen with crisp high-resolution imagery, so readability is strong on either model. But if you frequently drive unfamiliar routes or need to see complex interchanges at a glance, the 7-inch display on the OTR720 gives you a bit more confidence.
Truck routing is identical—so what are you paying for?
Both the OTR620 and OTR720 use the same custom truck routing system. You enter your truck profile—height, weight, length, width, and hazardous materials—and the navigator suggests truck-preferred routes. This is the core feature that keeps you off roads where your rig doesn't belong.
The price difference comes down to screen size and the bundled accessories. If you already have a good mounting setup or prefer to save money, the OTR620 offers the same routing intelligence in a smaller package.
Arrival planning: a feature that pays for itself
Both models include expert arrival planning, which helps you figure out where to park and how to approach your destination. This is especially valuable for truckers who deliver to unfamiliar warehouses or loading docks. The feature works the same on both units, so your choice really depends on how much you value the larger screen.
Decision rules: OTR620 vs OTR720
- Choose the OTR620 if: You want the essential truck routing features and a more compact, budget-friendly unit. The 6-inch screen is still bright and readable, and you get the same custom truck routing and arrival planning. If saving money is a priority, the OTR620 is the smart pick.
- Choose the OTR720 if: You spend long hours on the road and want the largest, easiest-to-read display. The 7-inch screen is especially helpful for navigating complex interchanges or when you need to see more map detail at a glance. If you often drive unfamiliar routes, the extra screen real estate is worth the upgrade.
- Check your cab space: Before you decide, measure where you plan to mount the GPS. A 7-inch unit may be too large for some dashboards or windshields. Make sure the mount location gives you a clear view without obstructing your driving. Always test the fit in your cab before finalizing your choice.
Garmin dezl OTR620 and OTR720 at a glance
- Garmin dezl OTR620 6" GPS Truck Navigator, Satellite Imagery w/ Accessories Bundle: The Garmin dezl OTR620 features a bright 6-inch touchscreen display with crisp high-resolution imagery. A 6-inch screen is compact and easier to mount in tighter cabs, while still offering clear visibility.
Garmin dezl OTR620 6" GPS Truck Navigator, Satellite Imagery w/ Accessories Bundle - Garmin dezl OTR720 7" GPS Truck Navigator, Satellite Imagery w/ Accessories Bundle: The Garmin dezl OTR720 features a bright 7-inch touchscreen display with crisp high-resolution imagery. The larger 7-inch screen reduces the need to zoom in and out, making it easier to read at a glance.
Garmin dezl OTR720 7" GPS Truck Navigator, Satellite Imagery w/ Accessories Bundle
Which truck GPS fits you?
Best for
- Long-haul truckers who want the largest screen for easy reading
- Drivers who frequently navigate unfamiliar routes and complex interchanges
Not for
- Budget-conscious buyers who can get the same routing features on a smaller screen
- Drivers with limited cab space or strict mounting constraints
