The Zodiac Medline II 2012 vs Zodiac Zoom 400 SR 2007 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.
Size is the most obvious dividing line here. The Zodiac Medline II 2012 measures 19,7 feet overall (2012), giving it roughly 6,7 additional feet of deck space compared to the Zodiac Zoom 400 SR 2007 at 13,0 feet (2007). Weight tells a clearer story for trailering families: the Zodiac Medline II 2012 tips the scales at 1 521 lbs — 1 267 lbs more than the Zodiac Zoom 400 SR 2007 at 254 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 150 hp, the Zodiac Medline II 2012 has a 120-hp advantage over the Zodiac Zoom 400 SR 2007's 30-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 Zodiac Zoom 400 SR 2007 is rated for 7 passengers, while the Zodiac Medline II 2012 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Zodiac Zoom 400 SR 2007 could be the deciding factor.
At this size, power-to-weight ratio matters more than outright horsepower. The Zodiac Zoom 400 SR 2007 comes in at 9 lbs per hp versus 10 lbs per hp for the Zodiac Medline II 2012. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.
The Zodiac Medline II 2012 has a documented top speed of 46 mph. Speed data wasn't available for the other model.
The Zodiac Medline II 2012 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Zodiac Zoom 400 SR 2007 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.
Bottom line: Choose the Zodiac Zoom 400 SR 2007 if your priority is putting more people on the water — it handles 7 passengers and at 13,0 ft it has the deck room to back that rating up comfortably. The Zodiac Medline II 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.