Difference between two versions of Doom III

[Schnook121]

I was looking at gogamer.com and they have two versions of doom 3 listed. One is the import version for 29.95, while the other is the normal retail for 44.95. Is there any difference??
linky
thanks!

 

[Schnook121]

anyone?

 

[flexy]

no idea...the only difference i see on the cover is the "M" (M for mature) label on the us version.
I could think of if it is an EU import that they censored out some violence/blood etc...but thats just a guess...