Green Day: Rock Band (PS3) vs Rocksmith (PS3)

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.

Introducing the next stage in the evolution of the music game. Rocksmith, the first and only game where you can plug into any real guitar. Nothing plastic. Nothing fake. Just the most authentic guitar experience in music gaming. By plugging into your console, you’ll develop real skills and real styles while playing absolutely real music. Featuring gameplay that automatically adjusts to your personal ability and innovative game design that makes playing music visually intuitive, Rocksmith will engage experienced musicians as well as those who have never picked up a guitar in their life. You’ll unlock mini games to hone specific skills. You’ll be able to choose from a large catalog of songs in different styles. And you’ll experience it all with an honest-to-goodness guitar. Nothing compares to playing a real guitar. Except playing Rocksmith.