Harr-Nuta: If anyone is interested in the difference in the GOG version included iso image and the EA Classic jewel case:
There is none , md5 check sums of all files are identical -> the same files.

Just bought it for the future possibility of inclusion of the disk versions with speech/TO pack added (missile problems anyone? :D )

Lord_Kane: Didnt the CD Version already come with those addons?

Harr-Nuta: It comes with the addons , yes , but gameplay wise it behaves differently to the disk version (as discussed somewhere else in this forum), high cycles and smooth flying generally means useless missiles in the CD version.