Its something about 128 bits of randomness from 12 words and how ecc is/128 bits too. Something like that

A script can easily be remembered because sentences makes sense. You could technically remember the 24 words if you try to make up a song or story but I believe it’s slightly different.

This is why it's good to be able to have both Monero and Bitcoin on the same Cake Wallet seed phrase, so you have to remember only one 😅