When the game was released in Japan a week or so before Europe, they hadn't applied a patch that updated the engine sounds. By the time the release came for Europe the patch was ready, for PC at least, so was probably applied as a same day patch, so you probably wouldn't have even realised it applied a patch.
So I'm assuming the video you watched was from a unpatched version of the game
The patch definitely improved the sounds compared to the original. So I'm not sure, maybe they are different! With the rushing through to release 2014 while really working on 2015 and lack of any real patches for 2014 I wouldn't be surprised