Uhm, it doesn't work this way. Being 8 months older (Michkov over Bedard) on average may be an advantage because the younger player has 8 additional months to grow and improve, not because of a fact that the older could have started his hockey career a year earlier. It's not a comparison of Maths skills of 9yo and 8yo, lol.
If your thesis is that Michkov may have an advantage over Bedard right now due to being 8 months older, then yeah, it is certainly possible. But keep in mind that Michkov has proven record of outplaying as an underager players from earlier draft classes: he's had historic MHL season as 16yo, he dominated Winter Youth Festival where several top prospects from '21-'22 drafts played (McGroarty, Fantilli, Savoie etc.) - and right now he's in a middle of amazing WCH U-18 as a D-2 player.
Does it mean Michkov is a better prospect? To be honest, I don't know. But if you ask me as for today, who has shown more to be labeled as a potential generational-level prospect (or the 3rd-best prospect since Ovi), I'd say Michkov. And that doesn't mean that I think Michkov is a generational level-prospect, or I think he's a better prospect than Bedard, because honestly I don't know at this point. But the sample size of him dominating older players is just much bigger.