What exactly does Carlsson do better than Fantilli other than being an inch taller ? He doesn't have the skating or shot or 2way motor of Fantilli and Fantilli seems to have the higher IQ as well from all the footage I've seen.
Turning down a prospect better than draft year Eichel for a guy who didn't even have as good of SHL numbers as Elias Lindholn seems like a bad idea.
Carlsson has better offensive IQ, he's got a patient game that revolves around extending offensive possession. That offense helped to lead his team in scoring at the WJC and SHL playoffs.
Carlsson and Fantilli are different types of players, both elite in what they bring. If you want a physical, speed demon with scoring prowess, then you'll like Fantilli. Fantilli's speed and size allows him to play hero puck. If you want great puck protection and extended offensive possession, then you'll like Carlsson. Carlsson is able to excel within a team structure.
The concern I have about Fantilli is that explosive offense loses that explosive descriptor against tougher competition at the WJC, Big-10 Championship, and Frozen Four. Bedard broke the Canadian points record with his 23 points, and was a +14 rating. On the same team, Fantilli had only 5 points and a +0 rating. I do understand that Fantilli was regulated to bottom-6 duties most of the time, but Zegras put up points as fourth line center to be pushed up the lineup during his tourney.
Carlsson's problem is he's a bit top-heavy and can easily be knocked down. If he can develop tree trunks for his legs, then his skating should improve as well as become more of a heavy player (more checking, heavier checking, potential to be a little bit more physical). Also, we don't know how well he can adapt to the smaller rink.
Since Anaheim is choosing, I don't think it matters who Anaheim picks because they already have top talents on the NHL club already. Fantilli or Carlsson will be able to fit in with the current top-6 youth forwards. We're that fortunate.