Luffy doesn't use CoA, there is no clash of Haki.
Who spoke of Kaido? It is Zoro who receives Kaido's attacks and uses CoA and there is no lightning.
I'll give you another clearer example. I think even a two year old would understand:
Same attack, one has lightning and one doesn't.
Bonus:
Clash of two swords with CoA and there is no lightning,
I can also give you an example with Sanji if you feel more comfortable.
Who spoke of Kaido? It is Zoro who receives Kaido's attacks and uses CoA and there is no lightning.
I'll give you another clearer example. I think even a two year old would understand:
Same attack, one has lightning and one doesn't.
Bonus:
Clash of two swords with CoA and there is no lightning,
I can also give you an example with Sanji if you feel more comfortable.
2. Zoro properly held on to his swords resulting in a haki clash..
3. Swordsmanship skills fight scene..
lt hit Luffy so there was a clash just like the first Thunder Bagua that one shotted Luffy..