When two boats share the same hull type — in this case both the Triton Boats 170 CC 2008 and the Triton Boats 351 XD 2009 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?

The power gap is worth calling out. Rated to 1 050 hp, the Triton Boats 351 XD 2009 has a 975-hp advantage over the Triton Boats 170 CC 2008's 75-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

For family outings this is probably the sharpest distinction between the two. The Triton Boats 351 XD 2009 is rated for 12 passengers, while the Triton Boats 170 CC 2008 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Triton Boats 351 XD 2009 could be the deciding factor.