Futuremark says that 3DMark Fire Strike is a second generation DirectX 11 benchmark and the scores cannot be directly compared to those from 3DMark 11, but regardless of that we ran both tests and you can see the results in the table below.

The results demonstrate that the new mark places more load on GPUs, which makes the difference between high end and low end graphics cards even more pronounced than in 3DMark 11. The new 3DMark uses higher resolutions and the tests themselves are better optimized to put DirectX 11 features to good use.