The real blockchain is RaiBlocks, as oppose to what people think its completely different than IOTA and IoTChain. DAG is just a very generic term (even bitcoin has its own "DAG").

RaiBlocks is fully decentralized and a very simple technology (white paper of 8 pages, just like the first one of Satoshi Nakamoto). The technology is called Block Lattice. Performance wise it is far beyond any other Blockchain technology currently, including other using a DAG: http://i.imgur.com/oRpO8lc.gif