Both the Tahoe Pontoons 25 ft. Grand Tahoe 2012 and the Tahoe Pontoons Vista 26 ft. 2009 are pontoon designs, both built in aluminium, so 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?
On paper these two are close siblings in the size department - Tahoe Pontoons 25 ft. Grand Tahoe 2012 at 25,0 ft versus Tahoe Pontoons Vista 26 ft. 2009 at 26,0 ft. At 2 450 lbs and 2 400 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.
Both boats share a closely matched power ceiling - 150 hp for the Tahoe Pontoons 25 ft. Grand Tahoe 2012 and 150 hp for the Tahoe Pontoons Vista 26 ft. 2009. 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 Tahoe Pontoons 25 ft. Grand Tahoe 2012 is rated for 13 passengers, while the Tahoe Pontoons Vista 26 ft. 2009 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Tahoe Pontoons 25 ft. Grand Tahoe 2012 could be the deciding factor.
Bottom line: Choose the Tahoe Pontoons 25 ft. Grand Tahoe 2012 if your priority is putting more people on the water - it handles 13 passengers and at 25,0 ft it has the deck room to back that rating up comfortably. The Tahoe Pontoons Vista 26 ft. 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 12 that costs less to run day-to-day.