When two boats share the same hull type — in this case both the Sea Hunt Triton 188 2013 and the Sea Hunt XP 21 2010 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?
The power gap is worth calling out. Rated to 200 hp, the Sea Hunt XP 21 2010 has a 50-hp advantage over the Sea Hunt Triton 188 2013's 150-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 Hunt XP 21 2010 carries 58 gallons versus 38 gallons in the Sea Hunt Triton 188 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 Hunt XP 21 2010 is rated for 6 passengers, while the Sea Hunt Triton 188 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 Hunt XP 21 2010 could be the deciding factor.
Bottom line: Choose the Sea Hunt XP 21 2010 if your priority is putting more people on the water — it handles 6 passengers and at 21,2 ft it has the deck room to back that rating up comfortably. The Sea Hunt Triton 188 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.