Differences?
Which Super Chipmunk do you want to compare it to?
There are (or were) many different Super Chipmunks and all where custom built. Everyone is different.
Most likely you are thinking of the Super Chipmunk that Art Scholl flew with the opposed engine and fixed gear. If so, the big differences would be the cowl, wing tips and rudder. Also keep in mind that it has a tandem cockpit--the CGM Super Chipmunk has a single place cockpit.
As far as I can tell, Art Scholl had three Super Chipmunks. See following replies for pictures.
Here is the first one: