When two boats share the same hull type — in this case both the Sea Chaser 1800 RG 2013 and the Sea Chaser 2100 RG 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?

Size is the most obvious dividing line here. The Sea Chaser 2100 RG 2012 measures 21,3 feet overall (2012), giving it roughly 3,3 additional feet of deck space compared to the Sea Chaser 1800 RG 2013 at 18,0 feet (2013). Weight tells a clearer story for trailering families: the Sea Chaser 2100 RG 2012 tips the scales at 2 512 lbs — 2 357 lbs less than the Sea Chaser 1800 RG 2013 at 155 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 225 hp, the Sea Chaser 2100 RG 2012 has a 110-hp advantage over the Sea Chaser 1800 RG 2013'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 Sea Chaser 2100 RG 2012 carries 75 gallons versus 3 gallons in the Sea Chaser 1800 RG 2013. 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 Sea Chaser 2100 RG 2012 is rated for 7 passengers, while the Sea Chaser 1800 RG 2013 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Chaser 2100 RG 2012 could be the deciding factor.