Who's better? I perfer Colfer, due to the fact I adore secluded geniuses. But his Benny and Omar book was also a good read.
JK Rowling. Definitely. I've found myself skimming paragraphs, and having to read over in colfer, never with Rowling.
Although, Colfer has better characters.
Rowling by a hair. However, to determine whether or not she's really this good, or the Harry Potter series was a fluke I'd like to see her next series.
Colfer, Harry Potter to staraight-forward, you can see a lot coming. Colfier decieves you and strings you along until the big reveal.