The comic is much better at characterization than the movie, but the movie is okay if you just want to know the plot. There's a lot of Ozymandias in Erwin but I honestly can't see much of any Rorsharch in Levi.

There's also a set of prequel comics (Before Watchmen): Ozymandias's is really good (and gorgeous artwise) and the others are okay-ish. But you shouldn't read those unless you don't care about being majorly spoiled for Watchmen.

GETTING INSPIRATION FROM A PARIS HILTON VIDEO = SOMETHING GREAT. XD