This page details bugs of Metal Slader Glory: Director's Cut.
Missing Music Cue#
In the restaurant Vivace, after interrogating Yayoi enough, she'll break character. In the Famicom version, a music cue plays. The Super Famicom version attempts to play the song "Music #4" (ID 07), but because this song isn't part of the current music bank, the music will go silent.
(Source: Original TCRF research)
Missing Sound Effect#
In the Famicom version, when an alien attacks, a sound effect plays for the alien's roar. In the Super Famicom version, the sound effect is called but is silent.
(Source: Original TCRF research)