There is not necessarily a great difference in longevity between brands, EXCEPT, the Whirlpool brand...AO SMITH....and Lowes.....are the subject of a class action lawsuit, involving the unreliability and lousy design.
Bradfor White is a brand sold only by plumbing professionals, and is very highly regarded. As is Rheem, who makes Rheem, Ruud, and the GE brand.
Within each brand, there is usually a good/better/best. The actual differences are minimal. You do pay more for the longer warranty. Local water conditions as much as anything affect the lifespan.
A conventional flue gas water heater will not be able to do better than the .59 to .63 range. Too much heat loss up the middle. Direct vents and power vents can be more efficient, but cost a lot more.
If you expect to be in your home more than 12 years, and expect that you can keep track of the receipt, and can actually REMEMBER the issue 12+ years from now, then the longer warranty might be worth considering, even the "lifetime" warranty available from the box stores when they install it. You have to remember that the warranty usually only covers the tank itself, and you may be on the hook for the labor cost of installing the new one.