He already admitted the *major* difference. 
One requires trust in a custodian (ecash), the other doesn't (Monero)
It's can never be a full replacement for Monero because of that.

That being said they each have their own unique advantages. For instance, ecash is: instant, free to transact, and can be used offline. 

Different tools and use-cases.

The Monero "debasing" Bitcoin part makes zero sense