The Nitro 929 CDX DC 2004 vs Nitro Z21 XL 2022 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 300 hp, the Nitro 929 CDX DC 2004 has a 50-hp advantage over the Nitro Z21 XL 2022's 250-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads — 57 gal and 55 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Nitro Z21 XL 2022 is rated for 6 passengers, while the Nitro 929 CDX DC 2004 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Nitro Z21 XL 2022 could be the deciding factor.
Bottom line: Choose the Nitro Z21 XL 2022 if your priority is putting more people on the water — it handles 6 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Nitro 929 CDX DC 2004 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 4 that costs less to run day-to-day.