Genetics? Compared to ///everyone/// else in the world, ///all/// pro BBers have ///one-in-ten-million/// genetics for muscle size, shape, and proportion. The top winners have ///one-in-a-hundred-million/// genetics. If you mean to compare genetics between the BBers only, well, that's easy: Flex's genetics make him look like Flex, Dorian's genetics make him look like Dorian, etc, etc, etc. They each train(ed) in whatever way worked best for them and took(take) whatever food, supplements, and drugs work best for them, so: Whoever you think looks best, -that's- who you think has the best genetics.