Both the Triton Boats 1860 SC 2008 and the Triton Boats 20HP 2009 are modified-V designs, the first built in aluminium and the second in fibreglass, so 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 - Triton Boats 1860 SC 2008 at 18,0 ft versus Triton Boats 20HP 2009 at 20,0 ft. Weight tells a clearer story for trailering families: the Triton Boats 20HP 2009 tips the scales at 1 764 lbs - 794 lbs less than the Triton Boats 1860 SC 2008 at 970 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 Triton Boats 20HP 2009 has a 160-hp advantage over the Triton Boats 1860 SC 2008's 90-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
Both boats are rated for 6 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.
Bottom line: Performance buyers should lean toward the Triton Boats 20HP 2009 and its 250-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Triton Boats 1860 SC 2008 with its 90-hp rating is the more economical daily driver.