Trump is merely a shady businessman, who shoots his mouth off.

Hillary was a traitor, who put her preferences above
the safety of the United States while serving in a high level Federal position.
"Classified information is material that a government body deems to be sensitive information that must be protected. Access is
restricted by law or regulation to particular groups of people with the necessary security clearance and need to know, and
intentionally mishandling of the material can incur criminal penalties. A formal security clearance is required to view or handle
classified documents or to access classified data. The clearance process requires a satisfactory background investigation.
Documents and other information must be properly marked by the author with one of several (hierarchical) levels of sensitivity—e.g.
restricted, confidential, secret and top secret. The choice of level is based on an impact assessment; governments have their own
criteria, which include how to determine the classification of an information asset, and rules on how to protect information
classified at each level."

Top Secret is the highest level of classified information. Information is further compartmented so that specific access using
a code word after top secret is a legal way to hide collective and important information. Such material would cause
"exceptionally grave damage" to national security if made publicly available.

Secret material would cause "serious damage" to national security if it were publicly available.

Yet she says "What does it matter?"

That is a kick in the gut to everyone who has ever had a clearance, and protected the information held as expected .