I am big fan of usage share data compared to market share data when it comes to Smartphones. It is well known that though Android has almost 4-5 times the market share of iOS globally, the usage share data is almost exactly opposite, with iOS smoking Android. The argument on which is more important depends on a lot of factors, including who you are, whether a consumer or an App developer or an Advertiser.
A new analysis from dotMobi (via TNW) shows the usage share comparing iOS and Android across the globe. In summary iOS and Android pretty much rule the Smartphone market, that's no news nowadays. It also re-emphasizes the fact that iOS tends to dominate in Western countries and Android in the developing markets. One point to note here is that a 20% share (Market share or usage share), say in India for the iOS is equal to or better than its 70% share in Japan, remember the population difference between these countries! So iOS's 20% share in India, where the Smartphone market is filled with ultra cheap 'Smartphones' [ref] is huge for Apple and a few % points gain should mean a lot in terms of market penetration.