Sweetener is sweetener such as sacarlos or splender used to sweeten a mix.
Cream is just that a cream taste. There are many creams and generally used to give a creamy smoothness to a mix such as adding cream to coffee. Some add smoothness, body and/or thickness to a
vape.
The sweet cream you are speaking of adds a sweet creamy taste to a mix basically mimicing sweet cream you would
buy at the market. It should not be used exclusively to just sweeten an mix.
Sweet cream could be used as a base or a foundation to make an ice cream or creamy desert mix.