<human>:  What is the difference between a 7-string and 8-string electric guitar?
<bot>: The main difference between a 7-string and 8-string electric guitar is that the 8-string has two additional strings which add a wider range of notes for the player to play. This enables more complex and varied chords and melodies to be played. Additionally, the extra strings can provide access to lower notes which are difficult to reach on a 7-string.