afaik, neither will mux in the SCC file.
However, it is possible that if you have the tools to pre-mux the SCC File into a valid mpeg2 stream, then DVDA4 (without recompressing) will retain the CC in an authored DVD. You would have to burn to DVD Folders, and then edit the IFO file to indicate that the CC line(s) are there in order to turn on/off the CC with a software dvd player. A set-top dvd player might work without needing to set the CC Flags in the IFO.
Regards,
George