The Slider has a slide-out QWERTY keyboard, it's 0.5" thick and weighs about 2.2 pounds, while the Transformer comes with a keyboard dock that turns the device into a laptop. The docking station has a built-in battery that will double the Transformer's battery life to 16 hours.
The Eee Pad Transformer is expected in April for around $399 to $699 while the Slider will follow in May for about $499 to $799.
The Eee Pad Transformer and Eee Pad Slider are equipped with 10.1” IPS touchscreens, NVIDIA® Tegra™ 2 mobile processor technology and will ship with Android® 3.0. The Transformer comes with a docking option that incorporates a QWERTY keyboard and serves as a battery extension station for up-to 16 hours of non-stop computing. The Slider is equipped with a sliding keyboard for those who desire higher mobility capabilities in a tablet product along with excellent battery life.Eee Pad Transformer (left) and Eee Pad Slider (right):