The Asus2 is a barre chord and a stretch for the fingers so it will likely take more practice. The index finger goes across the second fret, let the top of the joint hang over the top. When you press down you want to make contact with all strings, none should sound dead after plucking them individually. Once you have the barre stretch the ring finger to the fourth fret of the C string and the pinky on the fifth fret of the E string. Keep the top joints of those two fingers as straight as possible to avoid touching other strings.