Zether - The first privacy mechanism designed for Ethereum

Hi,
What are the benefits of Zether compared to AZTEC?

Few differences I can identify:

  • Zether is using the account model (no extra storage required if one is doing many split transactions)
  • Zether doesn’t require a trusted setup, but AZTEC requires it only once for many contracts (they separate the engine into a different smart contract)
  • AZTEC is cheaper and easier to reason about.

Any other feedback someone can share?