Not really? Whales also have earwax: https://ocean.si.edu/ocean-life/marine-mammals/whale-earwax-what-you-can-learn-strange-collections https://ocean.si.edu/oc

Not really? Whales also have earwax: https://ocean.si.edu/ocean-life/marine-mammals/whale-earwax-what-you-can-learn-strange-collections https://ocean.si.edu/ocean-life/marine-mammals/whale-earwax-... There are other differences too: Earwax is open to the outside world, while spermaceti is enclosed in an organ. Earwax is usually solid at body temperature while spermaceti is liquid. A single whale can have as much as 1900 liters of spermaceti, while usually people have much less than a liter of earwax.