[35636]

A dozen versions, sold by dozens of manufacturers. Android is so fragmented it's hard to actually consider it a single thing. It's like saying "4.5 million computers are sold every 3 days".

The iPad is one thing, made by one company, that comes in two sizes.

[josteink]

With different resolutions, different storage capabilities, different memorysizes and computational capacity. Some with mobile broadband, some without.

Which may be used with or without accessories such as a keyboard or stylus.

One thing indeed.

[shinratdr]

Why would a developer have to account for varying storage, mobile broadband, or Bluetooth accessories like a keyboard or stylus?

As for resolutions or RAM, I think we can all agree 2 is simpler than all.