Album/Single Cover Analysis - Comparison between the Subgenres

In order to establish the difference between the subgenres in the Alternative Rock genre, I have compared the ‘Eyes Open’ album cover by Snow Patrol (in the Indie Rock subgenre) with the ‘21^st Century Breakdown’ album cover by Green Day (Punk Rock subgenre):

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From this task, I have learnt that the typography, colour, composition and use of motifs can really help determine what a particular audience will go for when they browse for a CD and how important the album artwork is to the sale of the song. As I am thinking of using the ‘Boulevard of Broken Dreams’ song by Green Day, it will be the more modern and vibrant colours that I should think about; depending if that will suit the song and music video.