Ceramics have longer wear and less dust, but due to the compound my experience shows more wear on the rotor. This is on autos. Something has to wear right? I run the sintered pads on the bike, which for all purposes I guess would be a semi-metallic. I had some carbon ones on the rear of the RSV trying to help with the occasional lock up. Those guys liked so heat before gripping, so in twisties you had to sort of drag the rear brake. At any rate its not a huge deal.