He reminds me a bit of Sven Andrighetto, with unarguably better tools all-around minus a bit of the tenaciousness that Andrighetto has. Unfortunately, he hasn't really managed to do himself justice in Europe, what with sustaining injuries for extended periods of time (in fact, he hasn't played at all in the 2018-2019 season for his Liiga club untill now), but Ikonen is, and remains, pretty much a top-6 guy or bust. There's still loads of time for him to make something of himself, and he has pretty sick skills, but right now, with all the missed development time and physical toll of injuries, his path into the NHL is a pretty uphill climb.
As for Suzuki, I think we've got a small gem on our hands. He's really improved the speed at which he makes decisions on the ice and looks a bit faster going both ways in the OHL. That marked improvement in execution and speed, coupled with his smarts and skills, make him into a borderline bluechip prospect and I quite simply feel that his game will translate well into the NHL. I wouldn't be surprised if Nick Suzuki eventually ends up scoring 70 points in a season for an NHL team in a few years.