I rate Irie lower than Yukimura. Irie's power and stamina are pretty suspect against stronger opponents. Irie might do well against Yuki directly but against other opponents like Kazuya/Oni/Duke/Tanegashima/Zeus/Volk/ect. Yuki's results are probably better.
Yuki doesn't have any obvious weak points. Irie's 7 in mental covers a lot of his weak points. Against higher tier players, Irie's screwed.
GoF was a really fun watch. But not canon. Otherwise, Tezuka can kill dinosaurs. And Ryoma is already stronger than Ryoga.
Regarding Ryoga, he's only #4. But I bet that Ryoga could 6-1 or 6-0 Byōdōin/Volk/all HS/MS right now. I highly doubt he's actually tried yet in any of his matches yet. So, I wouldn't put much weight into the #'s either. I think only Byōdōin's #1 really matters. It's hard to say for sure how to order Oni/Kazuya/Duke/Tanegashima. But I think everyone puts Irie below them.
Beating Kaji means almost nothing. I think Konomi hates fast characters (Kaji's the fastest). Is Kaji stronger than Ochi, Yuki, Ryoma, Kintarou, Akutsu, Atobe, Sanada, ect? Atm, fastest MS is Shiraishi with star bible (7)? Kenya or devil Akaya at 5?
To the point though,
EoS Atobe could be on par or higher than EoS Yuki depending on what upgrades Atobe gets. Right now, I put him at the same level as Sanada. I don't see Atobe beating Kintarou/Akutsu/current Ryoma/Yuki yet. Sanada still beats Atobe as well. So, I put him at the bottom of this tier for now. I thought GoF happened before U-17 but I have no idea. If GoF is after than he's on Yuki's tier but beneath him.
@Kaoz we might need a mod just to make sure everything stays civil lol. This remains one of the most civil forums out there.
Old man point below...
The way I watch Pot/nPot is that all special abilities are somewhat grounded in reality but not actual reality. Only things that are scientifically measured like serve speed are actually real. I believe as readers we're intended to see the game through the eyes of children. So, nearly everything in Pot/nPot is more fantasy rather than reality. I expect top tier pros (1-5) to pretty much body everyone without doing anything "special". And suddenly all their "unbreakable" abilities seem useless. But that's what makes it interesting. Example, Kazuya is not opening a real black hole. If Kazuya is opening an actual black hole then Tezuka's shot actually went back in time and killed dino's.