Arbitrum Nova vs Crust

Arbitrum Nova is a high-performance alternative to Arbitrum One's chain. While Arbitrum One implements the purely trustless Rollup protocol, Arbitrum Nova implements the mostly trustless AnyTrust protocol. The key difference between Rollup and AnyTrust is that the AnyTrust protocol introduces an additional trust assumption in the form of a Data Availability Committee (DAC). This committee (detailed below) is responsible for expediting the process of storing, batching, and posting child chain transaction data to Ethereum's parent chain. This lets you use Arbitrum in scenarios that demand performance and affordability, while Arbitrum One is optimal for scenarios that demand Ethereum's pure trustlessness.

Crust is a decentralized storage network built on Polkadot, a multi-chain blockchain platform. It aims to provide a decentralized storage solution that is secure, reliable, and cost-effective. Crust allows users to store and retrieve data in a web3 manner, leveraging the power of blockchain technology to ensure data integrity and availability. Crust uses a combination of blockchain and decentralized storage technologies to achieve its goals. It offers incentives for users to contribute their storage space to the network, creating a distributed storage infrastructure that is resistant to censorship and single points of failure.