I think the difference between them is that the bitcoin is a Digital currency while the other is a Physical money, Bitcoin is decentralized while the other is centralized or the government is in control.
Bitcoin is a web-based virtual commodity, not a currency, that is essentially different from the digital currency that the central bank is studying. At present, the Bitcoin trading platform is often mistakenly identified as an exchange. In fact, the current Bitcoin trading platform does not have a corresponding financial license and can not be called an exchange.