unlikeという単語は、異なっているという意味で、特定のものと比較した場合に違いを示す口語的な表現です。differentよりも、単純に異なることを伝えたいときに使われます。例として、'Unlike most cats, he enjoys water.'(ほとんどの猫とは異なり、彼は水が好きです)が良い例です。
unlike in nature or quality or form or degree; "took different approaches to the problem"; "came to a different conclusion"; "different parts of the country"; "on different sides of the issue"; "this meeting was different from the earlier one"本質、性質、形体または程度において同様でない別様
例:took different approaches to the problem 問題への違った取り組みをする
differing from all others; not ordinary; "advertising that strives continually to be different"; "this new music is certainly different but I don't really like it"すべての他のものと異なるさま特異
例:this new music is certainly different but I don't really like it この新しい音楽は、確かに他とは違うが、私はあまり好きではない
distinctly separate from the first; "that's another (or different) issue altogether"1番目と明確に離れている別個
marked by dissimilarity; "for twins they are very unlike"; "people are profoundly different"相違点によってマークされる違った