@Ikhimany he was poisoned at that point, you couldn’t quantify the amount of power he has lost pre-transformation which would lead to his stronger form unquantifiably weaker than what he could have been if he transformed without being poisoned.
Base full power Urashiki has speed feats faster than Fused Momoshiki while also having hax that would let him chakra absorb neg anyone slower than him.
As for Kaguya vs Toneri, I am basing it off a promotional material that implied Toneri > Kaguya