The metal body version will raise the effective mass of the tonearm. So if you already have a mediun-to-high mass TA, you should probably go with the plastic version.
That said, the two bodies have different resonance/damping characteristics but I don't know what those differences are. Maybe someone else has that info.
That said, the two bodies have different resonance/damping characteristics but I don't know what those differences are. Maybe someone else has that info.