Guitar Hero: Aerosmith takes a "Behind the Music" style approach to the traditional gameplay. Each stage is book ended by newly-recorded clips of the band discussing their careers. Anyone looking for revealing dirt about the band, such as dependency problems and the band's split, won't find any of that here. Instead, the entire approach is more of a celebration of the good times. Still, there are mentions of some issues, so it isn't a super-sanitized version of the band's career.
Each venue is laid out similar to a concert. The first two songs act as an opening number and feature the usual line-up of Guitar Hero characters like Johnny Napalm and Judy Nails. After the two songs are completed, Aerosmith will make a dramatic entrance onto the stage, at which point they launch into the Aerosmith songs. Most of the early songs are come from the "lesser known" stack, while the big ones are used as encores.
As good as the music selection is, it feels more like an Aerosmith sample than a full-fledged tribute. There are only 40 songs (compared to around 70 in Guitar Hero III) featured in the game, which means that several big songs, like "Crazy" and "Dude (Looks Like a Lady)" aren't included. Granted, not every Aerosmith song would work well with the guitar-centric gameplay, but it's odd that songs like "Eat the Rich", which is all guitar, aren't included. Considering this is a full-priced release, it isn't too much to ask for a little more content, or at the very least have GHIII DLC work with the Aerosmith version.
Similar to Slash in Guitar Hero III, at one point in the Career mode, Joe Perry will challenge you to a guitar battle. This mode proved to be a polarizing feature in Guitar Hero III, so if you didn't like it then you won't like it now. The mode pits two players in a competitive match where they can earn attacks to launch at each other by hitting certain notes. I personally like the mode, but if it's not your thing, a more straightforward competition mode is also available, as is a Co-op Quickplay. The only really notable absence is the lack of Co-op Career.