The Truly Lost Idiot said:
Lelouch would win
.Too many options to his advantage .He would first gather info and slowly climb to the top as he knows his power lies in controlling the masses and since he isnt fighting an empire but rather controlling it from within it would be extremely fast process, find person geass him let him lead u to a higher ranked person and repeat. by the time light starts dishing out his grand plans lelouch would be standing at the top constanly monitoring the country for anything unusual.
What
Kira actually has the advantage in many regards.
Geass and The Death note are both equal in many ways, both having only one shot per person, limits and whatnot.
What gives Kira the win is the fact he has more experience and better plans. Kira actually won for at least a few years, and constantly avoided detection, despite the entire world goverment being after him
His plans are indeed quantifiably superior. Take note of Lelouch's scheme and Kira's involving memory. When Lelouch erased his own memory, his plan spanned only some minutes and was nearly thwarted by Mao. Compare that to Light, who made huge plans that spanned months and required him to be operating without any knowledge of it.
Furthermore, Lelouch always had to be bailed out by C.C., with her protectin his identity and usin him as a stand in. Compare that to Ryuk, who barely stepped in and when he was, was coerced or manipulated, and unlike C.C, did so mostly unwillingly.
Once again, Lelouch also is not as great at hiding his identity as you would think. His identity was threatened far too many times for tis and always responded poorly, with little backups. Compare this to Kira, who was left unchecked for years and was ultimately unconcerned by L's discovery of his loction. Heck, L found out where he LIVED and still couldn't catch him.
Also, Light losing because he was the ultimate loser of his story is inherently flawed. Not only did he actually succeed for years, but it took the smartest people in the world to kill him and even that was widely considered PIS.
So all in all, Light wins.