Creamed coconut is NOT what people put in coffee for ‘fatty/bulletproof coffee’ it’s the oil that’s used. As a cream replacement, coconut cream can work, some people use it - I use it in smoothies myself - but it does have more carbs than HWC (16g per cup) and also has veg protein. Different brands can vary in quality - some have nasty preservatives.
Coconut butter is also not used in coffee, as it has carbs - and contains coconut flesh, etc.
Coconut oil however, is wonderful in my experience. It’s 100% fat.
I prefer the extra virgin kind for my coffee, it has a sweet taste - but you can also use refined (which is wonderful for cooking and deep frying). I’ve always used a tblsp of it in my coffee with no problems.
However, the MCT oil (refined coconut oil that has two specific kinds of coconut fat extracted) is something I’ve stayed away from, as many people report GI upset from just a teaspoon of it.
Regular Coconut oil has about 60% MCTs, and 30% of the kind that are extracted into isolated MCT oil. The whole form of Coconut oil is way more complex and is a natural food, compared to the isolated MCT oil.