Manifold factors contribute to æternity’s uniqueness! One major advantage of æternity smart contracts is the fact that they are created off-chain. This allows to — once created — to interact with other participating parties blazingly fast and has important privacy implications. The users’ interactions stay off-chain and are kept secure. Only in cases of disagreement, a transaction will be submitted on-chain. The æternity blockchain will function as a crypto-court.
Furthermore, there is no limit to the volume of smart contracts that can be processed per second, since æternity smart contracts don’t share state, they can be processed in parallel.
In comparison to ‘legacy’ Ethereum, we switched from being goto-based to being function-based. Thus, it is a lot simpler to reason about and write more secure smart contract code.