In general, you would eat fewer calories compared to eating faster. It doesn’t affect your degree of hunger at the end of the meal or within the few hours thereafter. AJCN has the details.
Why the authors of the study didn’t report effects on body weight are a mystery to me. Probably trying to get another published article out of their work.
If calories matter in weight loss efforts, and I think they do, you may improve your weight loss success by eating slower.
PS: I only read the abstract.