I have a total of 3 Lumia handsets, but one of my 520s doesn't have Smart Cam, but has Smart Shoot. I also noticed the Lumia 520 without Smart Cam performs differently from the other 520. It seems to have a more realistic vibration.
Both Lumia 520 handsets were purchased 1 year apart.
Both Lumia 520 handsets were purchased 1 year apart.