大差不差

dàchàbùchà
roughly the same

CEDICT

  1. (originally dialectal Mandarin, now slang) roughly the same; about the same; not far off
  2. roughly the same; about the same; not far off

Wiktionary

Entry Composition

1 大 dà
  1. big; large; great
  2. older (than another person)
  3. eldest (as in 大姐 dàjiě)
  4. greatly; freely; fully
  5. (dialect) father
  6. (dialect) uncle (father's brother)
2 差 chà
  1. different
  2. wrong; mistaken
  3. to fall short; to lack
  4. not up to standard; inferior
  5. Taiwan pr. chā
3 不差 bùchà
  1. not bad
  2. OK