I was a day one Android fan (got the Nexus One) but I'd actually debate what "in charge" means... to me it doesn't necessarily mean dominating market share. I think the iPhone defined the touch-based smartphone when it came out and continues to do so. These days Android has a much more cohesive concept (in the form of Material UI and so on) but in the early days it was just a hodgepodge mess of ideas, even if it dominated the market.