Some time ago had circulated rumors that the Samsung i9000 S Galaxy will also present with Super Clear LCD screen in some areas of the market. At that time the rumor says that the model i9000 will be discontinuous, to the I9003 will replace it.
But, it turns out the Samsung I9003 is the successor of the Galaxy not S, at least there has been no official information from Samsung on this. The phone is just a variant of the product, to offer an alternative choice for the audience. So, Galaxy SL comes with a super screen LCD and Galaxy S2 wearing SuperAMOLED screen.