Normal camera is something other than "a normal camera" if that makes sense. I may have just confused the issue in order to explain that saying normal camera could cause confusion...
anyway, what are the rendering differences? a camera is a camera. you can make any camera in maya.
As GecT said, your perspective camera has some different settings than the one you create in the Create drop-down menu. Try rendering using the 2 different cameras and see for yourself.