DJ Hero 2 (PS3) vs Green Day: Rock Band (PS3)

The follow up to the award-winning, number one new video game IP of 2009, DJ Hero® 2 transforms living rooms into nightclubs all over again with an entirely new music gaming experience. Friends and families can become mix masters and singing sensations, experiencing hit music like they’ve never heard it before. With a host of new DJ and vocal multiplayer modes, including innovative DJ Battles, and 70+ mixes featuring the biggest dance, pop and hip-hop hits, DJ Hero 2 delivers the new standard in music and rhythm gaming.

Green Day: Rock Band is a music video game developed by Harmonix Music Systems, published by MTV Games and distributed by Electronic Arts. It is the fifth major console release in the Rock Band music video game series and, like other games in the series, it allows players to simulate the playing of rock music by using controllers shaped like musical instruments.
The game's soundtrack consists of songs by the popular punk rock group Green Day. Green Day: Rock Band will feature virtual depictions of the three band members performing the songs in new venues designed for the game. The game will incorporate existing Green Day songs already released for the Rock Band series as downloadable content, and will allow players to export its full tracklist to the other Rock Band game titles except The Beatles: Rock Band.