The bunny twins appear to be fairly rich, but Pretty flaunts her wealth a lot more than Eugly does. In this episode, when Pretty buys the ridiculously expensive cupid's arrow, she uses Eugly's life savings instead of her own money. Assuming that this is a regular occurrence and not just a one-time thing, it might mean that Eugly doesn't have much wealth to flaunt because her sister spends all her money, and Pretty does because she's able to save her allowance instead of spending it.
