ESRB Rating
Both Guitar Hero and Rock Band are rated T for Lyrics and Mild Suggestive Themes.
Platform Differences
While the content for both games remain the same across all platforms, Rock Band for Wii suffers from frame rate issues that are nonexistent in Guitar Hero. This is more apparent when four players are playing simultaneously.
Online Play
Guitar Hero on the Wii will connect to Nintendo's Wi-Fi network automatically upon booting up the game. Players can remain logged in throughout their entire session. Rock Band uses the friend code system to connect players. To play with friends, both players must enter each other's unique friend code.
Special Features
Guitar Hero on the Wii takes advantage of the Wii's SD card slot. Players can transfer and download songs to an SD card, which saves internal space and increases the load time of tracks on the SD card. While Rock Band can use the SD slot for downloaded songs, it will not load tracks directly from the SD card.
Career Mode
Both Guitar Hero and Rock Band feature career modes which can be played by 1 to 4 players (who can leave and join at any time).
Downloadable Content
Both games allow players to download extra songs (some free, some not) to an SD card. Some songs are available individually, while some are available only with the purchase of a song pack.