Final answer:
The comparison 'A musician or a harper' is a metaphor, which directly compares two things without using 'like' or 'as'.
Step-by-step explanation:
The literary term for the comparison of "A musician or a harper" is a metaphor. A metaphor is a figure of speech that directly compares two different things by stating that one is the other, without the use of connecting words such as "like" or "as". For example, saying "Time is a thief" does not mean time literally steals, but it compares time's effects to that of a thief taking things away. On the other hand, a simile is a comparison that uses the words "like" or "as", such as in "busy as a bee".