"Sansa = Ned 2.0 and Arya = Catelyn 2.0" is one of those takes where you can just tell people are more attached to the aesthetic than anything. "The Stark girls are most like the parent they look least like" sounds good on paper and people run with the idea, regardless of how it actually fits into the story. A majority of the justification relies on misinterpreting all of their characters + a healthy dose of fanon. What gets me is that this is the same fandom that insists that Lyanna, only compared to Arya in the text, is equal parts Arya and Sansa but Ned and Catelyn, two fully fleshed-out and complex characters, have to be more like one girl or the other? There's just nothing in the story to justify being so adamant about these comparisons. Arya and Sansa have parallels with both of their parents but at the end of the day, they are unique characters with their own stories. I'll never understand why people want to flatten these complex characters down to their most basic tropes and fit them into restrictive boxes just for a "poetical~" comparison.