Hunter Biden, as far as I know, didn't hold an official title within his father's administration. Jared Kushner, on the other hand, did hold an official title within Donald Trump's first administration.
Hunter Biden, as far as the country has been made aware, never requested an TS-SCI clearance, as Jared Kushner did. Jared Kushner was given one via overrule from the 45th administration when the FBI and CIA said there's no way in hell he should be given access to any state secrets due to his background.
For the record, fuck Hunter Biden for anything he might have done. But don't equate selling access to demanding the highest levels of access to our nation's most closely held secrets.