The short answer? No, CORO is not a bank. One of the main differences is that deposits held in a bank checking or savings account are used by the bank to create new loans and you, the customer, are merely a creditor. Furthermore, U.S. dollars held in your CORO account are not FDIC insured.
In contrast, CORO is a non-bank custodian of the customer's gold and it does not have the legal right to loan out or use the customer's gold as the company's collateral with its own creditors.
If CORO stopped doing business for whatever reason, 100% of your gold will be easily distributed back to you.