In Macbeth, what is the difference between Macbeth as a hero and Macbeth as a soldier?

It seems that the difference between Macbeth as a
soldier and Macbeth as a hero lies in the level of humility that Macbeth has in each
role.  As a soldier, Macbeth fights valiantly in honor of Scotland.  The Captain reports
that Macbeth has been fearless in battle and that he went after Scotland's enemies out
of loyalty to King Duncan.  Here, Macbeth is selfless and humble, acting only on behalf
of his king and his nation.  However, when Macbeth returns and is labeled a hero by
Duncan, the praise goes to Macbeth's head.  He is thrilled by his new title--Thane of
Cawdor--and he wants even more praise to come to him.  This sense of ambition motivates
Macbeth to trust the witches' prophecy.