Атака же вроде одна и та же, или чем они отличаются? 
На Титаноудар Кайдо ответил своим панчем, настолько мощно юзанув КВВ, что Луффи сам там закрывается от ударной волны, чтобы не снесло к хуям.
Right after Kaidou transforms into a giant fire dragon and his body melts Onigashima's horn, Kaidou opens his mouth and Luffy approaches his giant fist and there is a big Conqueror Haki clash (without touching).
Luffy even closes his eyes and puts his other arm in front of his face to shield himself from the shock wave.
In the final panel of this fight (before moving on to the part inside the castle) we see Kaido with his mouth open and Luffy's fist almost touching his teeth.
- The second fight is on the double page at the end of the chapter.
In this case we see it from afar and it is as if both attack again with the same techniques.
Although there is a Conqueror Haki clash (like in the first "confrontation").
Here they don't get as close (Kaido doesn't even have his mouth open).
The chapter ends with Kaidou and Luffy's faces are very similar to the ones at the end of chapter 1047
