>>942011587
Blacks are bigger. Proof is that we have a random white guy and a random black guy here, and the black guy is over an inch bigger than the white guy.
Combine that with https://www.urologiauerj.com.br/wp-content/uploads/2018/05/Anthropometric-study-of-penile-length-in-self-declared-Brazilians.pdf and it's clear that you should always bet on Black.