If you've been paying attention you'll have noticed that ice cream is shrinking. A half gallon is no longer a half gallon.
You can't see the mark on the bottom carton clearly enough (thanks camera-phone!) but it says 1.5 quarts while the top carton says 1.75 quarts. Same product, same price, different quantities. Earlier at another store I saw a carton labeled 48 ounces. The "Kong Kone" at the grocery store deli also shrunk.
I would rather pay more for the same amount than have Corporate America try to deceive me.