When two boats share the same hull type — in this case both the Sailfish 2100 BB 2013 and the Sailfish 2180 WAC 2012 are deep 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 — Sailfish 2100 BB 2013 at 21,0 ft versus Sailfish 2180 WAC 2012 at 21,3 ft. Weight tells a clearer story for trailering families: the Sailfish 2100 BB 2013 tips the scales at 225 lbs — 190 lbs more than the Sailfish 2180 WAC 2012 at 35 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 Sailfish 2180 WAC 2012 has a 50-hp advantage over the Sailfish 2100 BB 2013's 200-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sailfish 2180 WAC 2012 carries 95 gallons versus 63 gallons in the Sailfish 2100 BB 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 7 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.