When two boats share the same hull type — in this case both the Lund 1660 Classic Sport 2008 and the Lund 186 Tyee GL 2007 are modified vee 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?
The power gap is worth calling out. Rated to 175 hp, the Lund 186 Tyee GL 2007 has a 100-hp advantage over the Lund 1660 Classic Sport 2008's 75-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Lund 1660 Classic Sport 2008 carries 19 gallons versus 4 gallons in the Lund 186 Tyee GL 2007. 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 Lund 186 Tyee GL 2007 is rated for 5 passengers, while the Lund 1660 Classic Sport 2008 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Lund 186 Tyee GL 2007 could be the deciding factor.
Bottom line: Choose the Lund 186 Tyee GL 2007 if your priority is putting more people on the water — it handles 5 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Lund 1660 Classic Sport 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.