Realistically speaking Toji is a lot more stronger than just physical Yami the only reason why I say this isn't to downplay Yami since I have never seen Yami go against any big person with just physical strength. The only reason why I believe Toji is stronger is because his strength is no amplified with anything other than he was born with heavenly restrictions. Speed is very debatable I don't really think I could say that Yami is faster than Toji or Toji is faster than Yami for the sole reason than Naobito exists Spoilers aheadNaobito has projection sorcery a technique that allows him basically move faster than the eye can see even faster I'm not gonna go over the technique as much since it's extremely complicated. But even with this Naobito was getting losing to the Dagon. However Toji made the Dagon look like a little bitch when he was ressurected by Seance Technique.As for brain wise this automatically falls into Toji no debate since he is a prepares a lot thats why the only reason Toji lost to Gojo was for the simple fact that he wasn't aware of hollow purple. I haven't seen Yami do to much that is as smart as having an understanding of KI and if you count the time he angles perfectly that beautiful mana zone dark cloaked dimension slash. Either way Yami is still wise but not as smart as Toji since he analyzes his opponent weakness and strength. Also last thing to not I didn't include Maki for one reasonI know she basically fucked the zenin clan by herself but we haven't seen her true pinnacle of strength so this is still debatle on how strong Toji was since she is compared to him by that point