Yuji’s special trait is his physicality, which by itself is on par with a grade 1 sorcerer. At first, yuji didn't even seem to know what he was doing when he struck mahito's soul. Yuji just punched mahito the.
Yuji Itadori A Complete Guide to the Protagonist of Jujutsu Kaisen
Yuji seems to have gotten even better at striking the soul since his fight with mahito. I dont think the “current yuji vs ____” matchups are justified right now due to current yuji just awakening at the end of our last chapter. We don't know yuji's true cursed technique, and that is vital for a domain expansion, because that's what it is, the user makes a barrier infused with their innate technique that allows them to bring out.
Anyway, back to the main point.
When choso told yuji that they were brothers the first time back in shibuya, yuji was super confused but let it go since choso was now helping and they had bigger issues to worry about. Since eating sukuna's finger was the catalyst that gave yuji cursed energy, with sukuna now having changed vessels, does yuji still have the ability to use cursed. Yuji saying to mahito i am you is confirming and accepting that without mahito yuji wouldn't stand on top with the special grades But he's pretty much near special grade if we're just factoring close.
Yeah,.more like yuji could stall him even if cursed energy wasn't a factor, i'm pretty sure yuji is strong, but strong enough to beat todo in h2h fight then? This physicality combined with his finesse over cursed energy manipulation honestly makes him a freak. We really don’t know the extent of current yuji’s abilities. I presume sukuna internally excluded yuji from anyone, and yuji either internally excluded himself from anyone (or just didn't include himself since he was taking the entire thing as a joke at the time).