The Lund 1600 Alaskan Tiller 2011 vs Lund U2070 2005 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 Lund U2070 2005 measures 20,0 feet overall (2005), giving it roughly 3,2 additional feet of deck space compared to the Lund 1600 Alaskan Tiller 2011 at 16,8 feet (2011). At 860 lbs and 800 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 - 60 hp for the Lund 1600 Alaskan Tiller 2011 and 60 hp for the Lund U2070 2005. 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 Lund U2070 2005 is rated for 6 passengers, while the Lund 1600 Alaskan Tiller 2011 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Lund U2070 2005 could be the deciding factor.
Bottom line: Choose the Lund U2070 2005 if your priority is putting more people on the water - it handles 6 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The Lund 1600 Alaskan Tiller 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.