Kiviharju's different from every other Finnish prospect, comparing him to Kakko for example is ridiculous. The talent level's not even comparable. At Kiviharju's age Kakko was still playing u-18s.
I was actually at the hall watching the playoff game tonight since it was in my hometown. TPS wins 3-2, Kiviharju on ice for every goal for, none against, 2 assists and +2. He got benched for Jimi Suomi for the last few minutes while they were defending the lead, though. I don't get why. There were about 3 other defensemen I'd have benched ahead of him but oh well.
One thing that stands out is how quickly he makes good plays, doesn't need a ton of time to think with the puck. In comparison to Suomi, much less risky and ambitious, more reliable passing. Didn't do a single rush with the puck where he holds it for a long time like Suomi seems to constantly do and circle around(Kiviharju usually gives the puck up after a second or two) and Kiviharju also constantly stayed back as the lowest defenseman, but still Kiviharju was far more effective offensively.