They're both good games. CoD is longer, more difficult, and has a more interesting main character. Besides, while I hate to spoil LoI, the fact is that you don't even fight Dracula in it. Both stories are interesting, but CoD is focused around revenge, which I think is what makes it so interesting. If you want a short game and you want to learn the origin of the Belmont/Dracula conflict, then get LoI. If you simply want a decent game with a great story that is challenging and takes a long time to beat, get CoD.