Done.
I added the mcopy command to copy colors, styles, visibility... from one atomic structure to another. The syntax is like the Chimera mcopy command.
mcopy #1 toAtoms #2 settings csv
I made a few minor changes compared to Chimera. I added a separate "h" settings value to copy secondary structure (helix/strand/turn) info. In Chimera it copied secondary structure when you used "s" (style) which seemed wrong. I made "c" (colors) not copy label colors. Use "l" to copy labels including their colors. Also "l" (labels) does not delete labels already on the target atoms that are not present in the source atoms. The mcopy command does not effect molecular surfaces.