I understand what you’re saying (call it like a 10" 100 pound tungsten ball vs a 5" 50 pound tungsten ball) but your reasoning and logic of being essentially the same are just silly and the math that would dictate when each would land in atmosphere would still line up perfectly (which would be that the heaviest one will hit first). even if it were a 10,000 pound ball and a 5,000 pound ball.