QUOTE (shadow_Uzumaki @ Jan 19 2009, 01:00 AM) <{POST_SNAPBACK}>
Chidori is much less refined and looks like a white-bluish mass of lightning chakra. Raikiri is an enhanced version that's less chaotic and much more controlled. It's more blue than Chidori. I don't really remember, but when Kakashi used Raikiri against Zabuza, I don't think the ground was being split open, unlike Sasuke's Chidori against Gaara where Chidori made cracks on the ground.
If you took the time to notice, the ground cracked with Sasuke because he put his hand into the ground, where as Kakashi didn't.
There is no difference between Raikiri and Chidori, the name is only different because Kakashi called it Raikiri after he split a bolt of lightning if half with Chidori.