Here is a study that was just published and below is the link to the full text.

Dietary Intervention for Overweight and Obese Adults: Comparison of Low- Carbohydrate and Low-Fat Diets. A Meta- Analysis

Data Synthesis

1797 patients were included from 17 trials with <1 year follow up in 12. Compared with low fat diet, low carbohydrate was associated with significantly greater reduction in weight (Δ=-2.0 kg, 95% CI: -3.1, -0.9) and significantly lower predicted risk of atherosclerotic cardiovascular disease events (p<0.03). Frequentist and Bayesian results were concordant. The probability of greater weight loss associated with low carbohydrate was >99% while the reduction in predicted risk favoring low carbohydrate was >98%.


Conclusions

This trial-level meta-analysis of randomized controlled trials comparing LoCHO diets with LoFAT diets in strictly adherent populations demonstrates that each diet was associated with significant weight loss and reduction in predicted risk of ASCVD events. However, LoCHO diet was associated with modest but significantly greater improvements in weight loss and predicted ASCVD risk in studies from 8 weeks to 24 months in duration. These results suggest that future evaluations of dietary guidelines should consider low carbohydrate diets as effective and safe intervention for weight management in the overweight and obese, although long-term effects require further investigation.

We're a rich pool of long-term people with effects

What none of these studies can show is the superior sustainability of low-carb "diets." What happens to the trial participants in five...ten...twenty years?

There are many people on this site who have maintained a substantial or moderate weight loss for decades. That's an achievement to be studied!

I'd say lack of hunger is more than just a modest improvement. In one famous experiment, hunger literally drove the subjects mad. Why don't these article ever mention hunger? Sometimes I wonder just how mad people gotta be to begin with in order to succeed with low-fat.

I'd say lack of hunger is the key to success. Low-fat diets that tell you to eat mass quantities of lettuce and fiber to "fill you up" cannot fool the body into thinking it is not hungry.