Packaging
I really like the box these sticks come in. It really stands out from other items on the store shelf and lets you peek at what's inside easily too. The rear of the box has a decent amount of info in various languages and highlights on which kit is found inside.
Inside the box, you'll find two separate clamshells containing the DIMMs in pairs. I suppose that you would just get a thinner box with a single clamshell inside if you bought a two-stick kit.