Depends what appeals.
Thickness and a powerful aesthetic? Whites.
Contour, sweep and bulbous muscle bellies? Blacks.
Coleman was indeed massive, but upon analysis, he was still a traditional black structure, just expanded to ungodly proportions. His receptors reacted "positively" to the buckets of drugs he used. His strength was a result of chemically-inflated muscle and not an inherent predisposition to structural strength and power.
His bodily breakdown bears this out.
Blacks look more "cartoon-y", in general. In this way, they suit better to some favoured attributes of the judging criteria.
Then again, very few black champions will ever achieve the thickness, graininess and "strongman" appearance of a Yates.
Apples and oranges.
Tie.