The only issue with copying and pasting is it won't copy the shader base. So textures applied to channels that do not exist across shaders may not migrate. For example if you copy an Iray material and try to paste it on top of an 3DL shader base the results may not be what you expect.

You can check the shader type at the top of the surface tab, it will say something like Iray Uber or Daz Studio Default.

The best way to transfer material settings between figures is to save out a quick material preset which when applied will apply the shader, textures and all settings. Either that or make sure the same base shader is applied before copying and pasting.