Difference between Undercurrent and Undertone

What is the difference between Undercurrent and Undertone?

Undercurrent as a noun is a current which flows under the surface while Undertone as a noun is an auditory tone of low pitch or volume

Part of speech: noun

Definition: a current which flows under the surface An emotional presence that is concealed rather than exposed.

Part of speech: noun

Definition: an auditory tone of low pitch or volumean implied meaning; an undercurrenta pale colour, or one seen underneath another colour

We hope you now know whether to use Undercurrent or Undertone in your sentence.