It should just be called " The Palumbo Diet" --- no mention of "keto." A TRUE ketogenic diet is much higher in fats and much lower in protein. It is NOT ideal for Bodybuilders.
Daves is just a high pro , moderate fat, low carb approach, hardly relying on ketone bodies for fuel, moreso a mixture of glucose (protein turnover) and ketones here and there.
I personally like ALOT of diets -- it just depends on your current situation. How in shape of out of shape you are, how much energy do you expend each day, sedentary job etc....
I personally rather diet with carbs if possible --- I find myself more insulin sensitive and more tolerant --- this makes carbing up for a show MUCH more reliable.