Collins Chinese Dictionary Plus (3rd edition), 2011:
大同小异(異) dà tóng xiǎo yì much the same
- 他的新书(書)和上本书(書)大同小异(異)。 Tā de xīnshū hé shàng běn shū dà tóng xiǎo yì. His new book is much the same as his last one.