What Bill S said. The GDLP will be flat within a gnat's behind while the DMT might or might not be that close. It will be close enough and you can by six of them for the price of one GDLP. I use the GDLP on Shaptons and on some of my other hones because I have it but the D8C is a great tool and I could get by with the D8C by itself and do fine.