When two boats share the same hull type — in this case both the Ranger 620T 2010 and the Ranger Z518 Comanche 2013 are modified vee designs with fiberglass construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department — Ranger 620T 2010 at 20,1 ft versus Ranger Z518 Comanche 2013 at 18,7 ft. Weight tells a clearer story for trailering families: the Ranger 620T 2010 tips the scales at 1 725 lbs — 1 570 lbs more than the Ranger Z518 Comanche 2013 at 155 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
The power gap is worth calling out. Rated to 200 hp, the Ranger 620T 2010 has a 50-hp advantage over the Ranger Z518 Comanche 2013's 150-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Ranger Z518 Comanche 2013 carries 33 gallons versus 4 gallons in the Ranger 620T 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Ranger 620T 2010 is rated for 6 passengers, while the Ranger Z518 Comanche 2013 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Ranger 620T 2010 could be the deciding factor.
Bottom line: Choose the Ranger 620T 2010 if your priority is putting more people on the water — it handles 6 passengers and at 20,1 ft it has the deck room to back that rating up comfortably. The Ranger Z518 Comanche 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.