I've got to go with Laf. I think what's between the ears is the most important attribute in hockey, for anything in life really. And he has the right mindset, the personality, confidence, swagger, attitude, etc to be a star. As much as it pains me to say this, I just don't think Kakko has that "it" factor. He has a beta personality and I'm surprised this never came up as a red flag in pre-draft interviews. Watching the behind the scenes of the 2019 draft video it's abundantly clear how awkward and uncomfortable he is compared to the other kids. He's so uncomfortable in his own skin and was nervous about getting up to be drafted, so he started being really rude to his father about it. This is a common defense mechanism of people who aren't confident.
Watch @15:18