One difference: Trump encouraged the incident at the Capitol BEFORE it happened, whereas Harris expressed sympathy for the protesters AFTER the event. Trump CAUSED the attack on democracy, whereas Harris defended the Constitutional rights of Americans to peacefully protest.
A second difference: The Trump supporters who attacked the Capitol were committing obvious treason in attempting to seize control of the government and overthrow a legitimate election, whereas the Minnesota protesters were stating their justified displeasure after centuries of inexcusable racism in the USA. Even Republican politicians, Trump acolytes and Trump enablers have expressed their horror at the events of January 6...and understandably so.