Both the Landau 250 Atlantis Cruise 2008 and the Landau Signature Series 2300 2011 are pontoon designs, the first built in fibreglass and the second 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 - Landau 250 Atlantis Cruise 2008 at 25,0 ft versus Landau Signature Series 2300 2011 at 23,0 ft. At 2 392 lbs and 2 448 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 - 130 hp for the Landau 250 Atlantis Cruise 2008 and 130 hp for the Landau Signature Series 2300 2011. 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 Landau 250 Atlantis Cruise 2008 is rated for 12 passengers, while the Landau Signature Series 2300 2011 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Landau 250 Atlantis Cruise 2008 could be the deciding factor.
Both are 2-tube and 23-tube pontoon designs respectively. Tube diameter and gauge affect stability and load capacity - more so than most buyers realize when comparing on paper.
Bottom line: Choose the Landau 250 Atlantis Cruise 2008 if your priority is putting more people on the water - it handles 12 passengers and at 25,0 ft it has the deck room to back that rating up comfortably. The Landau Signature Series 2300 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 11 that costs less to run day-to-day.