Complex sentence: Unterberger enumerates a number of ways in which the Beatles'recording differs from the originalm such as the Beatles playing the main riff on guitar, while on Alexander's recording the riff was played on piano.
Split into simpler sentences: Unterberger enumerates a number of ways in which the Beatles'recording differs from the original. For example, the Beatles play the main riff on guitar, while on Alexander's recording the riff was played on piano.