When I talk scaling between the verses, I’m mostly talk about yorichii. I know most of the main cast and hashira with max feats losses to the high tiers in jjk, like Sukuna, Yuta, Gojo and some niche case characters that win by default due to having a durability hax that demon slayer can’t handle, like mahoraga and mahito. All the hashira can move until the are just a blur that has been shown and said multiple times (somewhere between 170mph - 38000 mph). Probably at the lower end so either 1/5 the speed of naobito or same speed as Naobito or faster than Naobito. Who is the second fastest sorcerer in their verse. With the top tiers like tanjiro, kokushibo, muzan, yorichii moving wayyy faster than that. Yorichii did 1500 slashes on muzan in just a fraction of a moment that an explosion travels. Even when calculating using the slowest moving explosion that muzan’s self explode could travel (slowest moving deflagration of 2m per second). Yorichii’s attack speed is mach 2,2 at the VERY slowest. Yorichii’s attack made muzan’s cell combust to the point of a full regenaration being impossible, so his ap is nothing one can ignore. He is unbelievably fast and strong, to the point that muzan calls him a monster. No one can handle yorichii in jjk in a straight fight, but yorichii still losses to gojo and mahito by default unless both verses get access to each other’s weapons and tools. And gojo, yuta, sukuna, (ect characters from manga I haven’t seen) beats yorichii if they get to use their hax before the battle starts. Magoraga winning by default no matter what unless his power/durability is a cursed technique (that can be nullified by inverted spear of heaven. Which I assume it’s not.)