I know that and my words take this into account. Even a year or even two years before his draft year, Draisaitl was better than Byfield in international tournaments when Draisaitl was younger. I don't think it's easier to perform in a dominated team than in a dominant team mostley U17 and U18 tournament. Either way, Perfetti was better at HG, Drysdale was better at U20.
Regarding Rossi, I said he was better NOW. The fact that Byfield is younger does'nt necessarily indicate that he has more room of improvement. For exemple, physically is already at his maximum potential unlike Rossi and Perfetti.
Byfield is 3rd on my board but I'm far from sure that he'll be the 3rd best player. Currently he's not as good as Lafrenière, Rossi, Lundell, Stutzle, Holtz, Raymond, Drysdale (+ Askarov). Probably the same level as Perfetti. If he was so strong there wouldn't be as many better players as he was. Shane Wright is already better than all 2021 OHL prospects. Last year, Lafreniere was already CHL's MVP.
Anyway, the main idea was that Draisaitl was probably undervalued. He was probably better than Reinhart in June 2014. As for Ekblad, he was probably less strong but he overtook a younger player. Proof that the date of birth doesn't determine player's improve.