Its massive, blocky head is unlike anything sported by other whales.
Spermaceti organ - Wikipedia
A sperm whale’s head is built for ramming
Sperm Whale Head Anatomy
Spermaceti - Wikipedia
From the Nature Index Paid Content. It contains special organs that contribute the finest quality sperm oil.
The brain is found far down Organs the lower back portion of the head. Sperm if the whales are ramming into one another, they probably can do so without hurting their ability Whale generate sonar clicks.