Shorter shutter lag
Shutter lag is the duration between the moment you click the shutter button on the cam and the time shutter starts to move. It is important to catch the exact moment you feel and also important for the fluency of your continuous auto shoots. Canon EOS 550D has a 11% quicker shutter reaction.
Much faster start up
Starts up faster about 73%
Viewfinder size factor
The images you see through the viewfinder seem smaller than the ones you see with a naked eye. The closer it is to the actual view, it is easier for you to take the right picture.
A little bit lighter
7% lighter design
RAW is a raw format, often used by professional photographers, that keeps more information about the photo as explosure, light, color details which needs to be processed on computer.
You can mount external flash
With an external flash mounted to the camera, you can have more natural and flexible lighting
You can plug-in an external mic
You can record higher quality audio with an external mic.
Full HD video capturing
1080p @ 30fps
24P for whom addicted to movies
24p refers to 24 frames per second. This is highly sought after by video enthusiasts as it helps get that film-look since films are traditionally shot at 24 frames per second.
Perfect sensor native resolution
5184 x 3456
22.3x14.9 mm APS-C
Perfect true resolution
These cams have CMOS sensors which produces better quality images. (Most main stream cams have CCD sensors)