I found a very minor difference in the frigate at the beginning. In the US version, when you go down the diagonal cargo lift elevator, when you exit it the hologram reappears, and if you walk backwards into it you'll end up going back up again. I did that so many times while backing up from the space pirate that jumps down. However, in the PAL version, the hologram doesn't reappear. If you back up into the elevator, it won't go back up, so once you get to that point in that version, you can't go back. I haven't played the NTSC Player's Choice, so I can't confirm whether that change is present in that version.
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