Not exactly the 'same', if you don't mind me saying so.
Stewart sold off her stock in a certain company based on a 'tip' from her stock broker. And she wasn't a federal employee or elected official, and didn't preside over or attend government meetings where decisions were being made that would effect the stock of a company.
The power of the federal government was being used to try and run her out of business. If you want to know who wanted to take over Stewart's market, follow the money.
It was a tip from the CEO of the company, not that it matters. Her selling wasn't illegal. She got in trouble for lying about it.