1.) Julius Caesar’s top quality was his Generalship. But, Augustus’ top quality was his administrative skill.
2.) Julius Caesar’s relationship with the senate was not good. It even cost him his life. But, Augustus built an excellent relationship with the senate which contributed a lot for his success.
3.)Julius Caesar had not paid enough attention for his personal security. He ended up at the hands of his assassins because of this. But, Augustus formed the praetorian guard to prevent assassination.