DJ Max Online shut down awhile back. It was for PC, and exclusively online. I have heard reports, however, that there will be a new version of this Online one that will even have servers for places outside of Korea, China, and Japan. Yet the difference remains: Online only featured 5B and 7B, and you use most of your fingers. On the other hand, DJMP2 has 4B, 5B, 6B, and 8B. And you use your thumb + index fingers. Online contained playable versions of all the songs from both DJMP & DJMP2, including the SC style. So in conclusion, Online is similar, but NOT the same. Better in some ways, yet lacks from not being portable, offline, etc.