Going by the mechanism of hydrolysis under basic medium, the lone pair of water will attack on C=O carbon.
Due to the negative mesomeric (-M/-R) effect and negative inductive effect of the nitro group, the C=O will act as a more electrophilic substrate as compared to the one which is has ether substituent,
(which due to its +M and +I effect will reduce the electrophilic character of the C=O),
will be easier to hydrolyse.