This hadeeth has nothing to do with the treatment of women being different to the treatment of men - of the same crime.
The reason why the woman was stoned to death whilst the male was lashed, was because he was not married but she was! She was guilty of adultery and he was guility of premarital sex (fornicattion). The former is far worse than the latter.
Had the gender roles been reversed, then the sentence would still remain the same. If the man was married and the woman was unmarried, then the man would've been stoned to death and the woman lashed.
Equal sentencing.
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