Yes Nutella is essentially just hazelnut butter.
However Nutella adds some other secret ingredients and makes it a bit different so that it has a better taste to it than regular hazelnut butter.
But if you have a recipe that calls for hazelnut butter you can use Nutella as it's basically the same thing.
I love Nutella though as to me it tastes even better than regular hazelnut butter.
Nutella is a bit expensive but it's so good and so worth the cost.
Just don't eat too much Nutella as it can be fattening and bad for your health but in moderation the Nutella is perfectly fine for your health.
Both Hazelnut Paste and Hazelnut Butter are made from the same ingredients using a mix of hazel nuts and sugar syrup.
So that makes the Hazelnut Paste and Hazelnut Butter the same thing however hazelnut paste and hazelnut butter have a slightly different taste from each other.
When making hazelnut paste the hazelnuts are roasted in caramel before they are processed and turned into paste so that makes the hazelnut paste sweeter tasting than hazelnut butter.
Hazelnut Butter does not go through the roasting process in caramel before being processed into the hazelnut butter.
The only difference you'll notice between the hazelnut paste and the hazelnut butter when making recipes is the taste.
But essentially hazelnut butter and hazelnut paste are the same thing using the same ingredients.