what game you prefer kudos or democracy? and why
You can’t compare these games. They are similar because of percent bars only. I think Democracy is more original, unconventional.
I agree, you can’t compare the two. Totally different games.
I think the best way to find out which of the two games you like more is to download the Demos. They’re both great games, and while the games are played using the mouse to control and progress through them, they play out differently from each other. I can recommend both Demos as a download, you may find one more appealling than the other but that all comes down to personal preference. This doesn’t help answer your question, but perhaps it will convince you to try them both since there really is nothing to lose. 
Cheers.
J.