Bradman and tendulkar have the same batting style, is their's the key to batting?

Both players are THE best. But the coincidence is that they have almost the exact same batting style. They both stand at the crease with their left leg's left side facing the bowler. They both bopped the bat up and down when waiting for the ball. Another similar batting style is Shane Watson's. We all know he is an awesome batsman, but the coincidence is that when he waits for the ball, he bops the bat up and down too. What are your opinions? Is their batting style the best one to use?