比不上

shuǐ cǎi huà bǐ bù shàng yóu huà

水彩画比不上油画。

Watercolour somehow to be the poor relation of oil painting.

tā hòu qī de zuò pǐn bǐ bù shàng tā zǎo qī de xiǎo shuō

他后期的作品比不上他早期的小说。

His later work does not bear comparison with his earlier novels.