For now many people will always choose physical money because, this is tangible unlike the electronic money and many people knows that they can use the physical everywhere and physical money is knows by everyone in this world unlike the electronic money, that is not really famous right now.
Now a days people doing online jobs we all know that, thats why here we will give importance to electronic currency over physical currency, but physical currency have its own importance and value. I think there is no difference between them because both are money and useful in their own ways.
Physical money more simple in usage then electronic and it also requires internet to use them, and for simple transactions like buying in a store i would be faster to use physical money for online payments will be better electronic.