It is really weird to read a manga of which you have seen the anime of, especially when now you have to make an effort to scroll + moving your eyes between panels, as opposed to simply laying back and staring at the screen as a whole.
@Kaizo made a good point, its a different feeling reading the manga and seeing what you've already seen, but in a different light. This series is sooo good it warms my heart ≧ω≦