When two boats share the same hull type — in this case both the Checkmate Pulsare 1850 BR 2009 and the Checkmate Pulsare 2100 BR 2009 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 — Checkmate Pulsare 1850 BR 2009 at 18,0 ft versus Checkmate Pulsare 2100 BR 2009 at 21,0 ft. At 1 415 lbs and 1 375 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 300 hp, the Checkmate Pulsare 2100 BR 2009 has a 125-hp advantage over the Checkmate Pulsare 1850 BR 2009's 175-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Checkmate Pulsare 2100 BR 2009 carries 38 gallons versus 32 gallons in the Checkmate Pulsare 1850 BR 2009. 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 Checkmate Pulsare 2100 BR 2009 is rated for 6 passengers, while the Checkmate Pulsare 1850 BR 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Checkmate Pulsare 2100 BR 2009 could be the deciding factor.
Bottom line: Choose the Checkmate Pulsare 2100 BR 2009 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Checkmate Pulsare 1850 BR 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.