Final answer:
The detail not commonly shared between the two passages is 'Juliet says that she would kill herself if Romeo/Romeus were killed,' as this is not explicitly mentioned in the provided lines. Instead, the lines suggest Juliet's fear of relatives harming Romeo/Romeus and a general despair.
Step-by-step explanation:
The passage that is NOT a detail the two selections have in common is: 'Juliet says that she would kill herself if Romeo/Romeus were killed.' This detail differs from the selected texts because, in the given lines, there is no indication that Juliet would take her own life if Romeo/Romeus were to die. Instead, this detail is a predictive sorrow expressed in other parts of the stories but not in the cited lines.
The sets of lines that best support this answer are:
- "I would not for the world they saw thee here" and "In ruth and in disdain I, weary of my life, / with cruel hand my mourning heart would pierce with bloody knife."
These lines reflect Juliet's fear of her relatives killing Romeo/Romeus and her own despair, but not the specific detail of her intent to kill herself if Romeo/Romeus were killed.