Blockchain
Every transaction needs to be recorded in each of the node’s ledger even if that transaction has nothing to do with the holder of the ledger.
This is like a supercomputer that can only act on one perspective about the authenticity of transactions.
Updating the system also requires the consensus of the majority.
Holochain
Individualized and asynchronous validation of transactions which enables massive scalability.
All data is held across the shared space by random nodes.
Network updates in parallel instead of in unison and trust is generated on an individual basis