Some brief previews of Microsoft's upcoming Surface Pro tablet from CES 2013, running Windows 8 Pro, have revealed more differences compared to the Surface RT tablet.

From Neowin:

Both articles also say that this pre-production version of the Surface Pro uses a third generation Intel Core i5 processor. However, it's still not clear if Microsoft might be able to add in the new version of the Core i5 chip to the tablet that reportedly uses less power, and therefore could improve its battery life. Previously, Microsoft has said that the Surface Pro will have about half the battery life of the Surface RT, which means users could expect to get between four to five hours of power for the Surface Pro.

Once the Surface Pro tablet goes on sale, Microsoft will have a 64 GB version for $899 and a 128 GB version for $999, both without the optional keyboard add-on.

Microsoft Surface Pro previews reveal more differences with Surface RT