DV and DS are nearly polar opposites.
I went through a few weeks agonizing over which to choose.
And then realized that they both serve a purpose.
DV runs on ancient, shitty software and is controlled by a bunch of complete jackoffs (the owner and admins, not the mods necessarily). It's also overrun with lunatics and trolls. But it's still the wild west, and that has a certain appeal.
DS has a fantastic owner/admin and excellent software, but a relatively small user base and no trolls to speak of. It's a great source of news and weird stories. It's relaxing to a fault, and lacks dynamic tension and conflict. In short, there is no drama at DS.
They are like two uncles, one geeky, soft-spoken and full of interesting facts, the other a heroin addict with a penchant for necrophilia. I love them both unconditionally. Family is family.