The biggest difference between the Samsung Ativ Smart PC and the PC Pro is in the hardware - the Smart PC runs on an Intel Atom chip and brags about having a battery life of 13.5 hours, while the Smart PC Pro features the Intel Core i5 chip and lasts for less, 8 hours. The Smart PC Pro also has a USB 3.0 port, while the Smart PC has USB 2.0 only.
Otherwise, the two devices look almost completely similar. Both have 11.6-inch displays that detach from the keyboard dock and could be used as a tablet with multitouch support, both come with Samsung’s S Pen and S Camera. The Ativ Smart PC Pro features a high-res full HD display, though, while the Atom-based Smart PC comes with 1366 x 768 pixel screen.
Samsung is planning on releasing the Ativ Smart PC tablets around the end of October with the launch of Windows 8 for a yet undisclosed price.