When two boats share the same hull type — in this case both the Sylvan Mirage Cruise 818 CR 2013 and the Sylvan Mirage Fish 8520 4-PT 2012 are pontoon designs with aluminum 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 — Sylvan Mirage Cruise 818 CR 2013 at 18,8 ft versus Sylvan Mirage Fish 8520 4-PT 2012 at 20,8 ft. At 155 lbs and 185 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 115 hp, the Sylvan Mirage Fish 8520 4-PT 2012 has a 110-hp advantage over the Sylvan Mirage Cruise 818 CR 2013's 5-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Sylvan Mirage Cruise 818 CR 2013 is rated for 8 passengers, while the Sylvan Mirage Fish 8520 4-PT 2012 caps at 1. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sylvan Mirage Cruise 818 CR 2013 could be the deciding factor.
Bottom line: Choose the Sylvan Mirage Cruise 818 CR 2013 if your priority is putting more people on the water — it handles 8 passengers and at 18,8 ft it has the deck room to back that rating up comfortably. The Sylvan Mirage Fish 8520 4-PT 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 1 that costs less to run day-to-day.