The Sealine F42 2012 vs Sealine S29 2005 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
The power gap is worth calling out. Rated to 600 hp, the Sealine F42 2012 has a 440-hp advantage over the Sealine S29 2005's 160-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sealine F42 2012 carries 317 gallons versus 126 gallons in the Sealine S29 2005. 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 Sealine F42 2012 is rated for 12 passengers, while the Sealine S29 2005 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sealine F42 2012 could be the deciding factor.
Bottom line: Choose the Sealine F42 2012 if your priority is putting more people on the water — it handles 12 passengers and at 42,4 ft it has the deck room to back that rating up comfortably. The Sealine S29 2005 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.