Okay, for those who have seen death note and geass
Light (with death note powers) vs Lelouch (with geass)
Assuming Light doesn't know Lelouch's name and the story was first set in geass world then set in death note world
WHO WOULD WIN??? (you can pick which "world" you wanna have it set in)
!!
Assuming that were just subbing in L for lelouch in this situation, lelouch easily, he would find out light (id assume hes that smart since he >>>>mao and would geass him to suicide.
Lets see, they start off, lelouch needs to find out just who light is, no name needed. Light needs lelouchs real name and his face. Well lelouch is well known so he is screwed if hes found out, so this puts them kinda even. Lelouch is better at commanding people, but I think if he was willing to go far enough and geass enough people he could win. He would have to geass everyone he thinks as suspects and get them to confess but yeh, he has the power of geass which is sumthing L didnt have and also he is as smart as L arguably. Lelouch wins for me