Both work, it does not matter because you are getting the default export either way.

There's no difference between the two examples you shared other than what you named the default export when you imported it. Either will work and are syntactically correct.

The standard convention is to Titlecase React when importing though:

import React from 'react';

Because of separate jsx-runtime (https://reactjs.org/blog/2020/09/22/introducing-the-new-jsx-transform.html) it it is not necessary to explicitly import React.

Just use named imports:

import type { FunctionalComponent } from 'react';
import { useState, useEffect } from 'react';