Not all cartridges reproduce the music the same. For instance my cartridges are shure M-44G which have a very low tracking weight (1.5g) and are less suited to scratching. They reproduce vocal better than say a shure M-447 which has a more enhanced treble and bass range and track heavier (3g) and are better suited for scratching.
When I can reserve the cash I'm going to invest in a mounted set of M-447s to take with me when I play out.