Sui is a Layer 1 smart contract platform that claims to offer unprecedented low-latency for simple use cases by forgoing consensus to instead use simpler and lower-latency primitives.However, this approach makes developing on top of Sui more complex.
Despite their shared origins, Aptos and Sui are very different in their attempts to solve the scaling problem. While Aptos is more similar to existing designs, Sui is more innovative and thus more complicated to build upon.