Hi Salvatore Di Stefano,
ARM GCC compiler is included in the KDS installation. It is recommended to remove any previous installation of ARM GCC from your PC before you install KDS.
If you install same version of the KDS on two machines, compiler and linker will be same.
I did not test, if the output is exactly same. May be there are some timestamps, that might be different?
SDK is not included in the KDS, so it is fully under your control, what version will be used.
Regards
Marek