The Unigine Heaven Demo is unique in that it is the only demo which allows for the following components in one package.
The ability to compare DX9, DX10 and DX11 in the same environment allows for the unique ability to see how the different cards perform across these different comparable environments. Tessellation was set at Normal Mode.
The updated 2nd version of the Heaven demo offers more segments and more options. As we've seen in the past, the Mainstream cards aren't designed to handle the Heaven demo at full-bore.