Monero:

✅ issuance decentralized (anyone can participate and mine)

✅ issuance predictable and known

Ecash:

❌ issuance centralized (only the mint can arbitrarily issue)

❌ issuance not predictable or known

The advantages over Monero (and even Bitcoin) that I can think of:

-nearly instant transactions

-txns can be cheaper/free

-it is offchain/ephemeral (no blockchain - potentially more private and scalable)

-It is 1:1 to BTC (ostensibly)

Other disadvantages:

-ruggable

-requires permission to swap out for underlying asset