Having watched Laine extensively at the time, and Kakko the last 2 years I can say that Laine's shot overall is better because of the velocity. Kakko's shot isn't really his focal point. He finesses the puck into a corner, rather than slap it behind the goalie. Kakko's overall game is better than Laine. His skating, puck-handling, overall strength, shooting, passing, hockey IQ. It's all good to elite. Laine's shot is elite, but that's it. That's what his career is built on. He is not an elite skater, passer or puck-hander.
I don't really trust MSG Networks to get comparisons right