The piece Beethoven wrote was down in the ledger lines, low and gloomy, but elegant at the same time. It played like one of his suicide notes given form into music rather than words.
The piece Haydn wrote was high in the ledger lines, light and playful. Any higher and it would go off the end of the piano, like climbing a tree and jumping out.
The piece Taki wrote didn't use ledger lines. It stayed in the middle, jumping along with a simple melody, tinkling like the laughter of the child who it was written to be played by.