Ahh, yes, I know the answer to this one, you have to export THEREISNOSPOON=TRUE
before you run it.
I must admit I'm intrigued by this now. Clearly most of the question has been lost in translation.
A 6K difference in resultant file size hardly seems significant so I doubt its limits related. Maybe this is a who can do what through 'sudo' question, but again the difference between the two command lines is so small it seems a really poor example/question if it is.
Somehow, I get the feeling we're never going to find out.