bandwagon effect vs upshot

bandwagon effect and upshot both are nouns.

Word	Noun	Adjective	Verb	Adverb
bandwagon effect	Yes	No	No	No
upshot	Yes	No	No	No

As nouns, upshot is a hypernym of bandwagon effect; that is, upshot is a word with a broader meaning than bandwagon effect:

bandwagon effect: the phenomenon of a popular trend attracting even greater popularity
upshot: a phenomenon that follows and is caused by some previous phenomenon

Other hypernyms of bandwagon effect include consequence, effect, event, issue, outcome, result.

bandwagon effect (noun)	upshot (noun)
the phenomenon of a popular trend attracting even greater popularity	a phenomenon that follows and is caused by some previous phenomenon