The first is a quite newly released script by HxC2001 / Jean-François DEL NERO...
...and the other is an older one by "Deskjet" (Simon Gündling)...
There have been two versions of this particular player, the first has some issues (apparently), so a complete rework has been done.... just to be complete, I've got both working with CODEF! :-)
EDIT: Literally one day after I posted this, the author made a change to Chiptune2, which required an additional file.... I have only just been made aware of this! Apologies - but this additional lib is now added, and the playback now works again!