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"Tú" is a form of "tú", a pronoun which is often translated as "you". "Aquel" is an adjective which is often translated as "that". Learn more about the difference between "tú" and "aquel" below.
tú(
too
)A pronoun is a word that stands in for a noun (e.g., she).
1. (informal) (second person singular)
A word or phrase used to refer to the second person informal “tú” by their conjugation or implied context (e.g., How are you?).
aquel(
ah
-
kehl
)An adjective is a word that describes a noun (e.g., the big dog).
a. that
Me gusta mucho aquella casa que hay en lo alto de la colina.I really like that house on top of the hill.
Aquel coche estacionado allá es mío.That car parked over there is mine.