Are there any differences in the outcome of bariatric surgery between men and women?

Possibly... The answer to this is possibly; i'm sure they look at all these details but i'm am not aware of any of the study(ies) results at this time. The best advice i can give is to ask a bariatric surgeon; or ask some people who have undergone the procedure. The bottom line though is the weight loss component; which is completely individualized based on how well one follows their diet post-op.
Men = Women. Men and women react equally to bariatric surgery, according to the current clinical studies.