When two boats share the same hull type — in this case both the Gator Bay Gator Bay 1900 RG 2010 and the Gator Bay Gator Bay 2100 RG 2011 are modified 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 — Gator Bay Gator Bay 1900 RG 2010 at 19,0 ft versus Gator Bay Gator Bay 2100 RG 2011 at 21,0 ft. At 138 lbs and 167 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 200 hp, the Gator Bay Gator Bay 2100 RG 2011 has a 25-hp advantage over the Gator Bay Gator Bay 1900 RG 2010'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 Gator Bay Gator Bay 2100 RG 2011 carries 76 gallons versus 4 gallons in the Gator Bay Gator Bay 1900 RG 2010. 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 Gator Bay Gator Bay 2100 RG 2011 is rated for 6 passengers, while the Gator Bay Gator Bay 1900 RG 2010 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Gator Bay Gator Bay 2100 RG 2011 could be the deciding factor.
Bottom line: Choose the Gator Bay Gator Bay 2100 RG 2011 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 Gator Bay Gator Bay 1900 RG 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.