大同小异

大同小異
dàtóngxiǎoyì
  1. virtually the same
  2. differing only on small points

CEDICT

Entry Composition

1 大同 Dàtóng
  1. see 大同市 Dàtóng Shì
  2. see 大同乡 Dàtóng Xiāng
  3. see 大同区 Dàtóng Qū
  4. (Confucianism) Great Harmony (concept of an ideal society)
2 小 xiǎo
  1. small
  2. tiny
  3. few
  4. young
3 异 yì
  1. different
  2. other
  3. hetero-
  4. unusual
  5. strange
  6. surprising
  7. to distinguish
  8. to separate
  9. to discriminate