I think the image quality of the Sigma lens is on par with the Canon lens, but I notice the Sigma underexposes the images in the first set a bit (maybe 1/3 stop or less). Also, I notice the Canon has somewhat a narrower field of view.


In the second set, the images are identical, but I guess it's because both are the same image! (taken with the Canon lens, yes, I did check the EXIF data []).


BTW, nice composition, especially the picture of the hanging lamp!