version:

2018-11-18 -- mmz4_usa = blood, vocals

2018-11-25 -- mmz4_europe = blood, vocals, logo

2018-11-18 -- rmz4_japan = blood





source:
https://github.com/emerilfryer1/RetroArch/tree/mega-man-zero-4/.abc






blood:

2018-11-18  final boss cutscene  (usa, europe)
- lots of blood

2018-11-18  creation  (japan)
- blood repositioning, orientation
- rbcannon blood

2018-11-16  opening cutscene  (usa, europe)
- v.claw blood

2018-11-15  creation  (usa, europe)
- blood slash effect





vocals:

2018-11-15  creation  (usa, europe)
- opening, credits vocals





logo:
2018-11-25  creation  (europe)
- usa title logo with animation






discussion:
https://www.romhacking.net/forum/index.php?topic=27330.0