zhè / liǎng ge / fāng àn / zhǐ yǒu / fēn háo zhī chā / hěn nán / zhí jiē / pàn duàn / yōu liè

这两个方案只有分毫之差，很难直接判断优劣。

The two plans differ by only a hair, so it is hard to judge which is better.