Difference between React.FunctionComponent and React.SFC

React.SFC (which stands for stateless function component) is an alias for React.FunctionComponent.

It was deprecated because functional components aren't stateless since React 16.8.

They are the same, just one a newer terminology. Have a look at the definitions, they are both aliases for the same definition:

type SFC<P = {}> = FunctionComponent<P>;
type FC<P = {}> = FunctionComponent<P>;