Ok, I went through and timed a run from each version, and there are actually no time differences between the 2 versions (PAL and North American.)

So most of the time differences in the run are from strategies.
I went through and timed each portion of the run, and all the regular running parts were the same on each version.

(You even had a faster time than mine on the 2nd outdoors area at the beginning, after climbing up the ladder.)

(Nice job btw.)

So here are the time differences for my strategies (not in Wupeng's video) :
Exiting the freezer: my "safe" strategy: 1.5 seconds faster
the "ideal" (but luck-oriented) strategy (outlined earlier) : ~4.5 seconds faster
Ashley holding cell: 8 seconds faster
JJ - Lab: 9 seconds faster
Krauser: Your strategy (or Wupeng's) is actually the fastest variation of this, I believe.

No dodges, very little extra running. The only difference is that I believe it is ~1.5 to 1.75 seconds faster to stay with the rifle after JJ. (Yes, I added up the total times for the next 3 parts to find that out. XD)
So,
Sticking with the Rifle after JJ: ~1.5 to 1.75 seconds faster.
So, 9 + 8 + 4.5 + 1.5 =
~23 seconds faster.

So
~6:08 should be possible on the PAL also.

(Or ~6:11 for the more conservative strategy after the freezer.)
Also, PAL players can save
~1.5 seconds by skipping the JJ in the garbage area.

If we run by him like that on our version, he will shoot Ada after she opens the door every time.

So we have to go and draw him into the gun-swing attack before continuing.

(Adds about 1.5 seconds.)