Got it.. The best players get a neon sign saying hit me.In Finland each teams current top point scorer wears a golden helmet. Blue one is for top U20 point guy. Kupari wore blue one for a while but Aleksi Heponiemi (Florida 2nd rd pick 2017) took over in points eventually.
EDIT: Heponiemi also wore golden one some times and Kupari was the second best U20 scorer at times so he got the blue one.