Keto diets all the way, unless your one of the rare ones that eats carbs and your insulin dosn't spike. For me, I eat to big of meal or eat to many carbs, blood sugar gets elevated and that spikes insulin and then you store fat. Its all about insulin, expecially for 25% of us.
Now if you get into ketosis you will loose more fat than any diet there is.
To get into ketosis you can not consume more than 20 grams of carbs a day. If you still cant get into ketosis then you need to up the fat.
Restricting calories only slows down the metabolism and you dont want that. You will loose at first and hit a major platou and soon put it all back on.