The Alumacraft MV 1756 SC 2004 vs Alumacraft Riveted Jon MV 1648 (15 & 20) 2012 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
The power gap is worth calling out. Rated to 75 hp, the Alumacraft MV 1756 SC 2004 has a 45-hp advantage over the Alumacraft Riveted Jon MV 1648 (15 & 20) 2012's 30-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
Both boats are rated for 5 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 Alumacraft MV 1756 SC 2004 and its 75-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Alumacraft Riveted Jon MV 1648 (15 & 20) 2012 with its 30-hp rating is the more economical daily driver.