Thanks for your detailed feedback.
I have seen the video you attached.
According to your opinion there are 2 issues, One is spacing at the bottom of banner text AND the Second one is some text breaks the line from right to new line during animation.
1st Ans: I did not find the space gap between two demos ( see the screencast given below )
2nd Ans: There are also no difference between two demos ( your website and our demo site ).
You showed the height & width by inspecting element that is generated automatically from jQuery according to text / word length. When the text does not fit in the <h1> as per width then it breaks down and makes a new line (both demos).
So I did not find the differences. Your website and our demo look exactly the same.
Please let me know your thoughts in this connection.