Two Men Walk into a Bar (a pre-prohibition mixology quiz)

The year is 1895.  Two men walk into a bar anywhere in the U.S.A.  Man ‘A’ orders a Whiskey Sour.  Man ‘B’ orders a Manhattan Cocktail.  Both men finish their own drinks and neither has anything else.  They pay the bill and leave.  Which man has consumed more alcohol?  I will give this one bit of additional information – though it could not affect the answer if two different bottles of whiskey were used, let us stipulate that both drinks were made with whiskey from the same bottle.  Feel free to leave your answer as a comment here, or to send it to me via e-mail.