Pettersson is on a stacked team. I remember seeing a stat like only 1 player on the entire Vaxjo team had a CF% below 50, and they have a team average of ~56. That is ridiculous. Yes, Pettersson has been impressive but I guarantee you that if he was on Brynas or Frolunda he doesn't touch those records. Nico is still producing at a ~50 point pace as an 18 YO in the NHL. It is certainly possible for Pettersson to become the better pro down the line. But in absolutely no world does Pettersson get drafted in front of Hischier if the draft happened today.
You got to be careful as you can't say absolutely, as if Pettersson is up against a generational player like a Lemieux, Gretzky or McDavid.
I think you are way over estimating Hischer's successful not spectacular, rookie year in the NHL to pettersson's consistently spectacular play in the SHL.
I think with out question if there was a redraft Pettersson would get some support for first overall at a minimum. I heard one analyst say he would have been considered for first overall if he wasn't such a string bean.
I have watched pro hockey for 47 yrs and Pettersson has a unique and incredible natural intuition of what to do with the puck and the skill and patients to pull it off. I have seen him in my "limited viewing" make plays I have never seen a pro make or even attempt. Right now his vision is without question a level beyond at least 95% of NHLers today and maybe higher. And his stick handling reminds me of Kane is lightning quick.
Don't get me wrong, Hischer is having a fine rookie year and is likely going to go on to have a very good NHL career with some All Star selections but he isn't even among the top rookie scorers so far. Boesser and Barzal are one two and I can see why. I am more impressed with Barzal's play then I am of Hischer's. And yeah, I have seen him play.