The jewel of the lard is right around the kidneys. But this is a fat that has a very specific crystalline formation and a high melting point.
Alton BrownButter typically melts around, you know, 90 Fahrenheit, as opposed to about 20 degrees higher for lard. So what that means is that when you're working with it, the lard is going to stay more solid, which is great for flakiness.
Alton Brown