When two boats share the same hull type — in this case both the Ranger 191 Cayman 2008 and the Ranger Z520 Comanche 2008 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?
Size is the most obvious dividing line here. The Ranger 191 Cayman 2008 measures 19,0 feet overall (2008), giving it roughly 17,0 additional feet of deck space compared to the Ranger Z520 Comanche 2008 at 2,0 feet (2008). Weight tells a clearer story for trailering families: the Ranger Z520 Comanche 2008 tips the scales at 1 825 lbs — 1 707 lbs less than the Ranger 191 Cayman 2008 at 118 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 250 hp, the Ranger Z520 Comanche 2008 has a 50-hp advantage over the Ranger 191 Cayman 2008's 200-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 48 gal and 48 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Ranger Z520 Comanche 2008 is rated for 6 passengers, while the Ranger 191 Cayman 2008 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Ranger Z520 Comanche 2008 could be the deciding factor.
Bottom line: Choose the Ranger Z520 Comanche 2008 if your priority is putting more people on the water — it handles 6 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The Ranger 191 Cayman 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.