The aim of Keto Chow is to be nutritionally complete keto food with 1/3 of ALL your nutritional requirements in each meal (electrolytes, protein, fat, vitamins, fiber, ALL of it).
Keto//OS is a mixture with exogenous ketones – you drink it and you will have ketones in your body regardless of whether you are actually in nutritional ketosis or not. For people doing ketosis to treat a disease like epilepsy, cancer, or Alzheimer’s; or for people doing elite level athletics who need quick energy but don’t want to break ketosis – exogenous ketones can be very useful. For many people, they’re of limited use. You’re not “in ketosis” unless your body is producing ketones its self. On top of that, if you do want to use exogenous ketones I would recommend checking out Perfect Keto or one of the other products that are not sold via Multi-Level Marketing.
If you’re curious, I’ve compiled a comparison of the various Keto “Meal Replacement” products available: https://www.reddit.com/r/keto/comments/6wjthf/comparison_of_keto_meal_replacement_options_costs/
Keto Chow is at the top with a cost around $11 per 2000 calories, Keto//OS is at the very bottom at $250.00 for 2000 calories.