CN Tower and structures like it serve primarily as platforms for broadcast transmission equipment. The great minority of their height is concerned with occupiable floors. Take away the habitable space, and you are essentially left with the same structure. . These two creations rightfully occupy two different categories. This is an internationally-recognized standard.
Skyscrapers are an American creation, with traditions more than a century old.
WTB defends this tradition without apology or debate. By this tradition, the World's Tallest Building title presently belongs to Malaysia. This is the full explanation. It is all we have to say on the subject. Inquiries and aspiring debaters are referred here without comment.