Difference between Export Release Build… and setting -debug=false

What is the difference between using Export Release Build and setting compiler argument -debug=false.

Size of file is the same but Export Release Build takes around 20-30sec for my project when compilig with -debug=false is instant. Both binaries are optimized according to the explenation from adobe help:

http://help.adobe.com/en_US/flex/using/WS2db454920e96a9e51e63e3d11c0bf 69084-7a92.html

Does Export Release Buid do any additional things when create binary?