The Marchs and the Bennets are families belonging to the lower middle class of their times.Meg,Jo,Beth,Amy are the March sisters,while Jane,Lizzie,Mary,Kitty and Lydia are the Bennet sisters and interestingly Meg and Jane are both the pretty eldest sisters while Jo and Lizzie are the rebellious, knowledgeable and straight forward heroines.
There are some themes that are recurring ones.Not surprising, since they belong to almost the same time frame.
FAMILY:

The Bennet family
This is an absolutely important theme in both the books.In "Little Women" more so.The March girls help and work eagerly for the happiness of family, especially during times of peril.As for the Bennet girls, it is more about marrying to save the family than actually any love for the family..excluding of course, Lizzie's love towards Jane and her father.
SISTERS:
Recommend