To use a car analogy, Apple is a premium car maker, similar to how Lexus is viewed in the USA. They make mid to high end products, at higher than average prices, with much less product variation. Lexus isn't selling trucks, for example.

Compare this to say GM, which makes a very wide range of products in multiple market segments Lexus doesn't attempt to even exist it, and frequently at the same to much lower prices in the market segments that they have in common.

So, with Apple, you basically have 3 device sizes to choose from, with or without WAN modems, at 4 incremental price points, all with fairly similar specs that tend towards the higher end.

Samsung and other Android phone makers have tens to hundreds of devices that range the gamut from tiny to huge. Want a 6" phone/tablet with a stylus? Android has it. Want a head unit that goes in your car and runs Android? Sure.

And with more choices * on average lower price points = more market penetration.

I'd on a per-car, Lexus makes more than GM, and in the same way, on a per-device basis, Apple makes more than Samsung.