How do the availability and diversity of applications differ between Android and Windows?
Which platform offers a broader range of apps, and which caters better to specific industries or niche markets?
Pretty sure you've already picked up on it from the tone of the replies, but that's like asking if a scooter is better than a mini van for transporting a family of 4.5 and can tow a boulder. Different markets, different capabilities.
Android is a mobile OS and while processors for mobile devices have come a long way, so have PC ones, so the capabilities of a computer OS like Windows, leverages this and has way more flexibility when it comes to software. Most mobile apps are stripped-down versions of popular programs, and heavy-processing tools like 3D rendering, complex computation, etc. will be relegated to a capable PC OS.