It's Jason Walsh here, international Hammer Staff, I'll tell you what I have found this ball does:
The Big Deal is a lot stronger than the Real Deal, as the Big Deal has the ability to get through the heads a lot easier, allowing the ball to stay more alive in the back end. It gives it more of a continuous and strong back end reaction.
For anyone who throws a lot of revs you will need to polish it to suit Australian conditions! For you guys with not as much hand, this is the ball for you.
Hope this helps
Jason