When two boats share the same hull type — in this case both the Glastron GS 259 2012 and the Glastron GT 205 2012 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?

Size is the most obvious dividing line here. The Glastron GS 259 2012 measures 24,8 feet overall (2012), giving it roughly 4,2 additional feet of deck space compared to the Glastron GT 205 2012 at 20,7 feet (2012). Weight tells a clearer story for trailering families: the Glastron GS 259 2012 tips the scales at 545 lbs — 270 lbs more than the Glastron GT 205 2012 at 275 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.

The power gap is worth calling out. Rated to 300 hp, the Glastron GS 259 2012 has a 30-hp advantage over the Glastron GT 205 2012's 270-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Glastron GS 259 2012 carries 56 gallons versus 34 gallons in the Glastron GT 205 2012. 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 Glastron GS 259 2012 is rated for 10 passengers, while the Glastron GT 205 2012 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Glastron GS 259 2012 could be the deciding factor.