Tegan and Sara Quin might be identical twins, but they don't have identical tastes, and their songbook is filled with the sisters' mashnotes to their favorite genres. Tegan loves her some feedback-laced punk, and crunchy, full-throttle anthems like "I Hear Noises" and "You Wouldn't Like Me" mix hooks and snarl, while Sara wears her love of synth-pop on her tattooed sleeve, bringing a New Wave ache to the lovelorn "Paperback Head."