異曲同工

异曲同工
tónggōng
  1. different tunes played with equal skill (idiom)
  2. different methods leading to the same result
  3. different approach but equally satisfactory outcome

CEDICT

different approaches but equally satisfactory results

Wiktionary

曲調比喻不同辭章方法相同造詣功效參見同工異曲

重編國語辭典

Entry Composition