If you just look at the hardware specs, there’s no comparison, and MK802 II provides much better value than the Raspberry Pi with a much faster CPU, more RAM, internal storage and more. Only the GPU processing power may be subject to debate, but I don’t really have data to make a proper comparison. So if you just want to run the device as a media player for example, I’d just go with MK802 II since you’ll get a smoother experience and more video codecs are supported. The only caveat is that you’ll have to use Android (and see the status bar during video playback), as although Linux video support is available, it’s not ready for prime time, and never will.

via MK802 II Mini PC Now Costs as Much as Raspberry Pi Model B. Let’s Compare Them!.