how can you tell the difference?
My point is that it's not about the difference between the two at this point. It's the fact that Sasuke has made the Chidori his own technique, while at the same time Kakashi's known for the Raikiri
Every time Sasuke uses his technique he calls it Chidori, not Raikiri
Kakashi on the other hand always yells out Raikiri, not Chidori
We don't have to get into a detailed discussion nit-picking the differences between the two. It's both senseless and useless.
It's like trying to differentiate the
Rasengan versus
Oodama Rasengan. They are "the same technique" because they work on the
same basic principle. The only difference is that one of them uses more chakra and is bigger. Therefore, they are by
definition different techniques.
This is a very good analogy to the Chidori versus Raikiri - one is just stronger.
At this point in the manga the difference lies not in the technical definition, but by who uses it.
-Kakashi uses the Raikiri
-Sasuke uses the Chidori