I actually think that as a character, Lelouch is better than Raito. But... Kira is at least 10 times smarter than Zero, and he has a better capacity to plan things ahead. He would definitely win by coming up with some mindf*cking strategy.

I know how will win... looking as both have the same end... id say it depends on where do u make them fight, if u make zero fight with kira at his manga... zero will win 😛 , if u make kira fight at zero's manga... kira's will win 😛

Yeah, I was thinking it all depends on the type of battle, and other factors. Kira is used to killing alone with just his notebook, he's never planned a full out battle with an enemy (like with weapons and soldiers and whatnot) while zero is used to those kind of strategies, like chess. He'd have his nightmare and his helmet and his team of Black Knights while Light usually works by himself. It's like pitting an amazing general of an army against a skilled assassin who works in the shadows.

I think they would both die... It would be totally like them.

"Thus is our treaty written, thus is agreement made
Thought is the arrow of time, memory never fades
What was asked is given, the price is paid"