Is there an advantage of the AT-PZEV versus the ULEV version of the HCH besides emissions? The gas tank is about 1.3 gallons less. Why is that?

Is the other advantage the increase in warranty?
http://www.ahm-ownerlink.com/Documen...t/apl27540.pdf

10yr/150k on battery versus 8yr/80k?

and 15yr/150k on other parts?