Good comparison! I've owned this lens and was happy with it, although I didn't like the sharpness at 1.8, nor 2.0. For my taste it was acceptable at 2.2 and quite sharp at 2.8! Now I am even happier with my 24mm 1.4, it's sharper wide open than the 28mm 1.8 :P And I love the colors and the contrast!