The Windy 29 Coho 2015 vs Windy 31 Zonda 2018 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.
Both boats share a closely matched power ceiling — 400 hp for the Windy 29 Coho 2015 and 400 hp for the Windy 31 Zonda 2018. 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 Windy 31 Zonda 2018 is rated for 9 passengers, while the Windy 29 Coho 2015 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Windy 31 Zonda 2018 could be the deciding factor.
Bottom line: Choose the Windy 31 Zonda 2018 if your priority is putting more people on the water — it handles 9 passengers and at 31,0 ft it has the deck room to back that rating up comfortably. The Windy 29 Coho 2015 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.