Phoebe-Mona Question Pgs. 206-237

Within a page of each other (210-211) we see both Mona and Barbara interact with their parents, specifically their mothers. The two treat their daughters very differently: Mona's mother is condescending and minimizes Mona's feelings, Barbara's is supportive and caring. Why does Jen include this juxtaposition and what is she trying to highlight about culture between the Gugelstein's the Chang's?