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"Listo" is a form of "listo", an adjective which is often translated as "smart". "Pues" is a conjunction which is often translated as "then". Learn more about the difference between "listo" and "pues" below.
listo(
lees
-
toh
)An adjective is a word that describes a noun (e.g., the big dog).
2. (prepared)
An interjection is a short utterance that expresses emotion, hesitation, or protest (e.g., Wow!).
4. (all right) (Latin America)
Regionalism used in Latin America: all the countries in South America, Central America, and the Caribbean. Does not include Spain.
pues(
pwehs
)A conjunction is a word that connects words, phrases, clauses, or sentences (e.g., The cat and the dog slept.).
a. then
Estoy cansado. - Pues vete a dormir.I am tired. - Go to sleep then.
No sé qué decirte, pues.I don't know what to tell you, then.
2. (emphatic)