I already commented on the matter saying they were both pretty similar in term of play style... They have good size, very high IQ, high compete, they are both strong playmakers first, but can hurt you with their shooting as well,.. Alot of similarities, but I would say Lundell has more jump to his game while KK might have the highest ultimate upside once he fills out with his reach and instincts, but its close, very close, not sure who is going to be the best player of the 2 at this point... To me, it has the potential to be 1A - 1B type of situation...
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I love Stutzle, he is an electrifying player, but Byfield has exceptional athletic and physical tools, that mix of size, skating, balance and skills are extremmely attractive since the ultimate upside is crazy... Will be hard to pass on at 2...
Edit: I suspect that some teams might still have Byfield #1 on their list even after the WJC, because of what he could become and that the center position is valued higher than the wing... Personally I think that Byfield is closer to Stutzle than Lafreniere, but I wouldnt be surprised if some teams still had Byfield first for the reasons mentioned above...