When two boats share the same hull type — in this case both the Malibu 21 vRIDE 2010 and the Malibu Response TXi 2013 are modified vee designs with fiberglass 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?
Both boats share a closely matched power ceiling — 450 hp for the Malibu 21 vRIDE 2010 and 450 hp for the Malibu Response TXi 2013. 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. Fuel capacity breaks the other way: the Malibu 21 vRIDE 2010 carries 46 gallons versus 4 gallons in the Malibu Response TXi 2013. 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 21 vRIDE 2010 is rated for 11 passengers, while the Malibu Response TXi 2013 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Malibu 21 vRIDE 2010 could be the deciding factor.
Bottom line: Choose the Malibu 21 vRIDE 2010 if your priority is putting more people on the water — it handles 11 passengers and at 21,5 ft it has the deck room to back that rating up comfortably. The Malibu Response TXi 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.