While it still has a lot in common with Drupal, it has reconfigured the core to include some of the most commonly used and requested plugins and they’ve done their best to make it prettier and easier to use for hobby-ists and bloggers as well as small businesses and non-profits that don’t need all the additional overhead that Drupal brings. It’s also got a small but very dedicated community of developers and users.
I’ve also been hearing some great things about Craft CMS, which you highlight, as well as Perch by Rachel Andrew and Drew McLellan.