I'm about to do a 3 month cut to lose as much bodyfat as

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I'm about to do a 3 month cut to lose as much bodyfat as possible while still maintaining gains. Only thing is that I'm not sure whether a ketogenic diet or a standard diet would be better or if either would actually be better at all. Obviously they both create a calorie deficit and this is what causes weight loss, but from experience I know that body composition is more complicated than calories in calories out.

Basically I've heard that a keto diet leads to a greater amount of fat loss compared to muscle, but is there actually any truth to this? It feels unnatural to be having coconut oil and butter in place of things like oats and vegetables, but equally it kind of makes sense with the whole "burning fat for energy" thing