Originally Posted by
Xuvial
Subjective. I found Code Geass vastly more fun and emotional.
If you want to see an anime about mind-games, suspense and plenty of dark/depressing tragedy, Death Note is the one.
If you want to see an anime about mind-games, heart-wrenching plot twists and plenty of action/fight-scenes mixed in, see Code Geass.
The main difference in the two can be put down to the amount of action, the "darkness" of tone, and how you'll be left feeling at the end (because how it ends is what you will remember the best).
At the end of Death Note I was just sitting there for ages thinking "well...that was fucking depressing. Deeply emotional and enjoyable at times, but still a depression-fest followed by an abrupt ending."
At the end of Code Geass I was literally crying my eyes out of the sadness of the situation, but at the same time I was punching the air because of the "victory" achieved. I was left thinking "wait...I see the ultimate motive behind it all now...this is genius, absolute genius!"
In either case I don't feel like watching either anime ever again, because I don't want to go through that kind of emotional beating again :P