i wouldn't be able to tell u what or how much difference there is, however i just love mitsui's... can't even say why. i just think they're the highest quality cd-r's around... it's kinda like i only buy plextor cd-rom/rw's too. sure that s&f or whoever one is sorta 😉 plextor, but i just want the real thing i guess... that's for MY storage and backup. friends stuff. bah, whatever's cheapest 🙂