Attack of Galaxy S4 gadget spam

When the Galaxy S4 launched in April, Samsung sold one version of its flagship smartphone. Two months later, there are five S4 devices on store shelves.

There's the self-explanatory Galaxy S4 Mini. Then there's the Galaxy S4 Zoom, which marries a smartphone with a full functioning point-and-shoot camera. Samsung released the waterproof and dustproof Galaxy S4 Active. And let's not forget the Galaxy S4 Mega, which strangely offers a massive 6.3-inch display -- only with fewer pixels than the original Galaxy S4. (None have yet been announced for U.S. markets, but the prospect doesn't seem far fetched, either.)Despite all these spinoff phones sharing the same branding, the Galaxy S4 Active is the only "S4" that bears any resemblance -- inside or outside -- to the original Galaxy S4. The Mini and the Zoom have very different designs, processors, displays, and cameras, and they feature varying amounts of storage and RAM. They're hardly the same phone at all.From a pure hardware perspective, there's no logical concept or idea that really links these phones together aside from being Samsung products.But from a business perspective, it all makes sense.