不分伯仲

Explanation: Impossible to separate the first and second 　　Examples: The two suitors by a large margin, good family background are the same, ~, so she did not know how to choose. Thesaurus:  to march abreast, all right matter, about the same (in term of competence, quality, etc.), Quarter between Bangladesh Antonym Group:  irregularity, Scattered mixed, Poles apart, poles apart, Cuspid Phase system, Canines with the wrong, pressing or otherwise weight, priority