for any kind of carving activity, finding the knife that fits your hand shape and size best is going to lead to the least fatigue and best perception of cutting ability, all other things being equal.
i had a friend who is a professional wood carver, and he always used to remove the handles from the knives and make the handles himself to fit his hand to an exacting level (like squeezing clay level)
i dont have a picture of the knife, but i have one pic of a carving he did with the knife. shows what a good carving knife can do with some skill to back it up.
the Helle looks like it has a nice high volume handle which would offer good support for carving. and shaving wood.
