Don't games have to come out fairly close to each other to be direct competition. I mean, DA2 might've come out in 2011, but its been out for ages. (pun intended

) People aren't really making a choice over whether to buy DA2 or Skyrim.
As for the lack of dragons; well, as someone pointed out, Dragon Age has never really been about hunting down dragons. Even in Origins, the Arch-Demon technically wasn't even a dragon. With Skyrim's focus being on killing dragons to gain powers, I'd be surprised if it DIDN'T have more dragons in it.
As for a simple comparison; well, peronally it's hard for ME to compare them sense I like different things about each. I love Skyrim's huge open world and freedom to roam about as you wish. I also enjoy the flexibility of the leveling system.
Dragon Age 2 I love for the story and characters. I like the fast combat and unique visual style.
Gun to my head, I'd probably have to choose Dragon Age 2 as the game I'D prefer. But then that's MY preference, which has no bearing on your's or anyone else's.