Is there an apostrophe?

Her coat is different from that of her sister's.

9 answers

No- It would be: Her coat is different from that of her sister.
Even better would be this: Her coat is different from her sister's.
I disagree with Summer.

The sentence implies that the coat is different than her sister's coat.

The apostrophe is needed.
The "that of" makes the sister possessive- no need to be possessive twice.
Who is right?I need help!
You convinced me, Summer. With that wording, it does not need an apostrophe.
I think that the apostrophe would be redundant
Yes. Thanks.
Sorry, our answers posted at the same time. I didn't mean to seem excessively insistent.