L.C.
I have checked both of these out. The Transform seems to be a faster speed--800 something processor as opposed to the Optimus S which is only 600 something processor. The Transform also lets you listen to FM radio without headphones.You can go online and compare the features exactly. I think my son will be getting the Transform as he has a really slow phone right now. www.letstalk.com/android-cell-phones. This is the site that lets you compare the phones side by side. One big thing is that the Transform has a slide-out keyboard and the Optimus S doesn't. Therefore the Optimus S is smaller. After you check out thie website, go to the store and try both phones. It works better if you can go where they have the real phone instead of just a dummy. That way you can tell how the keyboard will work for you. Good Luck!