The mandate was clear: create a character that appealed to Western sensibilities. Japanese designs were often considered "cute" or "kawaii," but Western marketing in the 90s was leaning heavily into attitude, grit, and rebellion.
Beyond lore, there was a technical barrier separating . Europe uses the PAL television standard (50Hz), while the USA uses NTSC (60Hz). Because Sega did not always optimize their games for PAL, European Sonic literally moved slower.
Modern CRT shaders are often fine-tuned using this version to recreate the specific phosphor glow of 90s television sets. ROM Hacking:
The Blue Blur Unbound: The Legacy of "Sonic The Hedgehog (USA, Europe)"