1) If U.S version deserves 90/100 for PQ then the PQ on the H.K version deserves 88/100. Why ? The contrast looked to be a tad weak and the image looked slightly soft. Screenshots may be the only option to figure out which version boasts superior PQ.
2) The H.K disc looks to be a winner in the bit rate department as it consistently hovers in the 30+ range.
3) The H.K disc is titled John Rambo and the opening company credits on the H.K disc runs 35 seconds shorter than the U.S version.