This is heavily compressed for the web and the difference is even much bigger and artefact-free but here:
H.264 720p

Raw 540p

The image is taking a HUGE leap on the 1100D, much much more detail, extremely fine noise structure, and of course very thick colour palette (14 bit) for grading to the point of being able to change WB in post!
Works very well with Fast cards at that resolution,
---Edit:
Another low-light test:
H.264 at 6400 ISO

Raw at 6400 ISO (@540p)

As you can see, much higher detail, finer grain structure, and more accurate color palette
From my test, the 1100D's low pixel count at 12, with large APS-C sensor, gives it an edge over the 600/700D in terms of low-light.