When two boats share the same hull type — in this case both the Malibu Wakesetter 21 XTi 2005 and the Malibu Wakesetter 24 MXZ 2013 are modified vee designs with composite 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 Malibu Wakesetter 24 MXZ 2013 measures 24,4 feet overall (2013), giving it roughly 3,4 additional feet of deck space compared to the Malibu Wakesetter 21 XTi 2005 at 21,0 feet (2005). At 34 lbs and 48 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 555 hp, the Malibu Wakesetter 24 MXZ 2013 has a 155-hp advantage over the Malibu Wakesetter 21 XTi 2005's 400-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Malibu Wakesetter 24 MXZ 2013 carries 78 gallons versus 46 gallons in the Malibu Wakesetter 21 XTi 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 Malibu Wakesetter 24 MXZ 2013 is rated for 18 passengers, while the Malibu Wakesetter 21 XTi 2005 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Malibu Wakesetter 24 MXZ 2013 could be the deciding factor.