When two boats share the same hull type — in this case both the Pro-Lite 18 Flats 2009 and the Pro-Lite 22 Flats 2010 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?

The power gap is worth calling out. Rated to 200 hp, the Pro-Lite 22 Flats 2010 has a 85-hp advantage over the Pro-Lite 18 Flats 2009's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Pro-Lite 18 Flats 2009 carries 27 gallons versus 4 gallons in the Pro-Lite 22 Flats 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 Pro-Lite 22 Flats 2010 is rated for 6 passengers, while the Pro-Lite 18 Flats 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Pro-Lite 22 Flats 2010 could be the deciding factor.