People say minato's kunai was wind infused. If thats the case it should accomplish the same penetrating abilities as sasuke's lightning technique and it didnt and wind is stronger than lightning
Kisame made it clear when he dodged Bee's pencil that raiton oscillations>Wind Oscillations, I dont know where you got that wind>raiton.
Also, Wind was stated to be > AGAINST lightning, no where was it ever said that it is stronger then lightning, stop making things up, you're not fooling anyone.
And furthermore, Minato had no backlift when he chopped off the tail, he was in mid air and in an awkward angle.
One last point, even if Sasuke's chidori spear had better feats in against the tail, that wouldnt automatically = better feats against A's armour, coz like it was stated in manga, Wind> AGAINST lightning, henceforth, a Hirashin Kunai enhanced with Wind frequencies would do better against a LIGHTNING Armour then a LIGHTNING chidori, because wind> Against Lightning.
Get your facts straight.