When two boats share the same hull type — in this case both the Triton Boats 1860 SC 2008 and the Triton Boats Frontier 21 2007 are modified vee designs with aluminum 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 — Triton Boats 1860 SC 2008 at 18,0 ft versus Triton Boats Frontier 21 2007 at 21,0 ft. At 97 lbs and 138 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.
Both boats share a closely matched power ceiling — 90 hp for the Triton Boats 1860 SC 2008 and 90 hp for the Triton Boats Frontier 21 2007. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup.
For family outings this is probably the sharpest distinction between the two. The Triton Boats Frontier 21 2007 is rated for 8 passengers, while the Triton Boats 1860 SC 2008 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Triton Boats Frontier 21 2007 could be the deciding factor.
Bottom line: Choose the Triton Boats Frontier 21 2007 if your priority is putting more people on the water — it handles 8 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Triton Boats 1860 SC 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.