Your battery's needs depend on where you live. A battery for Buffalo, New York is compeletly different than one being shipped to Miami.
As you may have read, there are lead and lead alloy plates inside an automotive battery. They sit in acid. Two dissimilar metals in acid causes a chemical reaction transfering electrons(electricity). The more plates you have, the more amperage the battery can produce. But the battery is only so big, as it has to fit in the battery tray, and under your hood. So the plates are thinned out, so more can be put into the case.
This makes more cranking power for Buffalo, but weakens the structure. A battery in Miami will have fewer plates, so lower cranking power, but can handle the heat of Miami (or Phoenix) better. Different manufacturers put more into their cold weather batteries than others. Thin plates can vibrate free easier. Vibration kills batteries just like heat does. Johnson Controls puts more into the materials than Exide. Or at least they did. So their cold climate batteries lasted longer.
That is the moral to the story.