AKG 612 comes with a (harder) circular earpads as opposed to the angled ones on the K701/K702. I actually find them less sweaty for extended wear. They do clamp more though.Overall signature is unique for AKG. Think a mixture between K702 Anniversary and K701. Extended treble, solid mid-range, with good amount of bass extension.I think they sound more like Grados with a larger stage to be honest. Imaging is great.