similar: - For transverse waves, the waves move in perpendicular direction to the source of vibration. For longitudinal waves, the waves move in parallel direction to the source of vibration . They are similar in the sense that energy is transferred in the form of waves. - Difference: - Transverse Waves: Displacement of the medium is perpendicular to the direction of propagation of the wave. Longitudinal Waves: Displacement of the medium is parallel to the direction of propagation of the wave.