Id choose Kapanen. Here is a couple very fair question's that cant be answered clearly.
What is Kapanen? He doesnt look like a Top 6 point producer moving forward. He doesnt look like a grinder/worker either. He is a combination of both, imo.
Where does Kapanen fit? For me its with Matthews-Nylander playing a worker/forechecking role but his numbers will inflate because of his line-mates and he will be destined to be overpaid. Also, will Kapanen completely defer to his line-mates and take that role on like Moore or Hyman would.
If Kapanen is with Kadri, that line badly needs a playmaker on that line. I dont like Kapanen with Kadri. Johnsson fits better with Kadri but they would need size, imo on the other wing.