Just a random question of racial tendencies

[Abcdxxxx]

How much of a difference to race effect physical characteristics? There's no definitive answer. In terms of voice, most of it has to do with surroundings. A well adjusted person from the same surrounding probably isn't going to notice the racial difference unless they find a particularly interesting characteristic that sticks out. Honestly I just think your observations are pretty naive and limited to your own travels and exposure to varied cultures.