What is the fundamental difference between the transactions made using Smart Card and E-cash?

Smart Card and E-Cash:

E-cash storable smart cards can dispense and store cash electronically, creating bills and coins lesser essential. This transfers funds over phone lines, making this easier to reload your smart cards. Here you can use such system wherever you notice the outlets accepting e-cash. It is basically an electronic wallet which allows person-to-person payments. The Internet  or telephone link  lets  you  create  this  person-to-person  payment  anywhere  within  the  world.  Such card can store around five separate currencies at similar time.