Answer:
Most importantly, in Suetonius's description, Antony speaks "but briefly" and Brutus did not speak at all. Antony did arrange (he was consul and it was his job) to have a song sung with the words "Saved I these men that they might murder me?", and had the heralds read out the oath the Senators had taken (under duress) to protect Caesar's life. Caesar was cremated shortly thereafter according to Suetonius.