Camera on 4s lighter than 4?

[pokershark]

I was just comparing the camera on my 4 and 4s.
Noticed that the camera on the 4s displays colours as slightly lighter than the 4.
Also, pictures generally look darker on the 4, even though brightness is set the same.

How is it for you guys?

 

[kappaknight]

The new camera optics captures more light - this was discussed in the announcement.