We have seen the Chidori and Rasengan clash three times. They've stalemate all three times as well, and they were both at full power. We've seen them clash twice at the Valley of the End and once under the bridge after Sasuke fought Danzo. I'm not going to put up links, but I'm sure you all remembered it. All three times they've stalemated but people still seem to think that the Rasengan is stronger, they're
equal.
Although they have been stalemated, they have different damage effects. Chidori is a striking move, piercing and lethal. Rasengan is a destructive technique, powerful and deadly. Say that the Rasengan and the Chidori were to hit the ground, which would have dealt more damage? Rasengan would probably make a wider crater, but the Chidori would probably make a deeper crater. This means that the Chidori focuses on one spot and to destroy that spot, stab through it. The Rasengan on the other hand doesn't stab through it, but it deals destructive damage.
I like Rasengan for it's destructive power. I like Chidori for it's lethality. I can't really choose between the two because I love them both so much.
