They are actually all money but the big difference is Bitcoin the users are few while money we all use it. In the current situation only money is legal while bitcoin is not legal in some countries, so basically you can see that bitcoin is weaker compared to real money.
Both are not exactly same because bitcoins also considered as an investment but money, not an investment. Bitcoin prices can go up and high quite faster compared any other currencies in the world. Both of them got advantages and disadvantages but I like both of them.