Men do appear to lose more weight than women during weight loss attempts, although it is possible that this is due to the greater baseline weight of men rather than the specific lifestyle interventions. Despite men showing greater weight loss than women in the majority of studies, women have still had significant weight losses meaning lifestyle interventions which include dietary and exercise prescription appear effective for both men and women. There is little evidence that men and women should adopt different weight loss strategies and the differences in weight loss seen in the short term may have little significance long term. To facilitate weight loss in overweight and obese men and women, health professionals need to focus on the inclusion of both diet and exercise in weight loss attempts and need to provide support for individuals to assist with implementation of programmes which has the potential to increase long-term success.

I see the meta-analysis confidence intervals usually overlap 1.0, meaning equal weight loss for men and women.

https://www.ncbi.nlm.nih.gov/pmc/ar...16-0171-sd1.pdf