
unterschiedlich
different
Not the same; differing from something else in one or more characteristics.
Die beiden Brüder haben sehr unterschiedliche Interessen.
The two brothers have very different interests.
different
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different
Not the same; differing from something else in one or more characteristics.
Die beiden Brüder haben sehr unterschiedliche Interessen.
The two brothers have very different interests.

various
Various; referring to a variety of things or types.
Es gibt unterschiedliche Gründe, warum Menschen eine neue Sprache lernen.
There are various reasons why people learn a new language.

differently
As an adverb: in different ways or to different degrees.
Die Teilnehmer wurden für ihre Leistungen unterschiedlich hoch belohnt.
The participants were rewarded at different levels for their achievements.
'Unterschiedlich' (different) is derived directly from the noun 'der Unterschied' (the difference). If you know the noun, you can easily work out the meaning of the adjective: it means 'showing a difference'.
Trotz ihres ähnlichen Aussehens haben die Zwillinge unterschiedliche Persönlichkeiten.
Despite their similar appearance, the twins have different personalities.
When comparing two things, you can say 'A und B sind unterschiedlich' (A and B are different). You can also use the structure 'A ist unterschiedlich von B' (A is different from B) with the preposition 'von' and the dative.
Meine Meinung ist unterschiedlich von deiner.
My opinion is different from yours.
When 'unterschiedlich' stands before a plural noun, it often means 'different kinds of'. It emphasizes the variety within a group.
Das Museum zeigt Kunst aus unterschiedlichen Epochen.
The museum shows art from various eras.
As an adverb, 'unterschiedlich' describes the way something happens. In this case, it is not declined and usually stands in the middle or at the end of the sentence.
Die Geschwister entwickelten sich sehr unterschiedlich.
The siblings developed very differently.
other / different
Ein anderer Ansatz is an alternative to the previous approach. Unterschiedlich highlights that two approaches are not the same in their characteristics. Use ander when choosing an alternative and unterschiedlich when comparing several approaches with one another.

Die Ansätze der beiden Versuche sind unterschiedlich aufgebaut.
The approaches used in the two experiments are structured differently.
Nach dem ersten Versuch wählen wir einen anderen Ansatz.
After the first attempt, we choose a different approach.