Whilst Zerocash is a improvement from Zerocoin, their respective implementations aren't simple forks of each other, but depend on different cryptographic assumptions with numerous tradeoffs. Each approaches supplement each other very nicely, along with a good way to explain them would be sibling projects. The number of coins circulating https://financefeeds.com/nibiru-evm-to-transform-ethereum-capabilities-for-tomorrows-web3/