Here's MY comparison with DirectX
Note : I'm running Windows 7 Ultimate. (Comes with DX11)
I made all these screens myself
-DirectX8-
Very good graphics for it's time, Windows ME
FX:
-v1.0 Shader acceleration
-Highest texture possible for DX8
-Glow
-DirectX9-
Windows XP - Windows XP SP3
FX:
-Water
-v2.0 Shader acceleration
-Reflection
-Ripple
-Highest texture possible for DX9
-DirectX10-
FX:
-Glow
-3D Effects
-v3.0 Shader hardware acceleration
-DX10 Shining
-DirectX11-
FX:
-v4.0 Shader hardware acceleration
1480 x 900 res. 32bit
Up to 20mb sizes per texture
Glow
Occlusion
Glow
Reflection
Grass effect
x6 Anti-Aliasing
High-quality shadows
Wood effect
Trilinear
I can't run all these effects very well, I only have an nVidia GeForce 7150M and an nVidia nForce 630M w/ 256MB RAM
Only 10-12 FPS MAX (On all low i get 300 FPS lulz)
I just can't wait until MS releases DX12 :3