Empire state building is an enormous steel and concrete spire with floors hung off of the spire. Twin towers were spaghetti boxes built from three story steel Lego like pieces that were not even bolted together, they slotted together and stringers stretched from side to side, 200 feet long. The empire state building has almost 3 times the building material per square foot of floor space. The towers 40000 square feet of space, on each floor, was filled with plastic walls and furniture, fuel. The state building walls are concrete and stone. Just some facts, no emotional content, no embellishment. There is more if anyone is interested