If you want the definitive "E" (emulation) experience, the fully updated NSP file is king.
Historically, the US versions of Samurai Shodown censored blood (changing it to white sweat). The NeoGeo Collection restores red blood... mostly.
This collection includes:
: Includes retro filters such as scanlines to mimic CRT arcade monitors, as well as multiple screen size ratios like "Pixel Perfect".