CocoaPods does not (currently) do dependency resolution with multiple versions of the same library. I'm not sure about the technical difficulties surrounding this but I believe one way to think about why it would be a pain is duplicate symbol errors that we've all undoubtably seen before. Unless RestKit updates their AFNetworking integration, which would take some doing I'm sure for such a large library, you'll have to pick which one you need more.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…