I'll do my best to compare the two dvd releases by Thundermedia and Mei Ah respectively. I did the screencaptures as identical as I could but if you notice them being different to their counterparts, it's because of my sloppiness.

The disc released in Hong Kong by Mei Ah is cut for violence whereas the taiwanese Thundermedia release is uncut. Below is information users Miles and Applespider submitted to The Asian DVD Guide regarding the cuts to the disc:

The Mei Ah DVD is missing gore... For instance, when the bad guy at the hospital leaves his arm behind, there are some awkward cuts to cut out the nastiest parts... When Lau Ching-Wan wings Francois Yip there's no John Woo-style closeup exit-wound... And when Jet Li guns down the bad guys on the street there aren't any closeup squibs. -Miles

A total of 100 seconds of various bits of violence throughout the film have been edited. Including the opening preface which explains why the experiment went wrong. -AppleSpider

For whatever reason the cuts were made (commercial perhaps?) I feel they do hurt the movie. One of the censored scenes even alters the plot! Due to a bit of bloodspurt being cut the HK version removes a bit of text explaining why this happened to the Squad 701 soliders.Look at the comparisons below:

Both discs aren't exactly framed at 1.85:1 (more like 1.70:1-1.75:1) which results in the burned in subs sometimes going off the screen slightly. The Mei Ah disc however is quite murky looking and doesn't handle the dark scenes very well. Thundermedia's presenation has those traits but does slightly better (a bit bright though looking at the grabs) and had less print damage. I did notice that Thundermedia's frame opened up slightly during the second half of the movie but the subs were still cut off on a few ocassions.

Both disc have Dolby Digital 2.0 tracks but while the Mei Ah one gets both cantonese and mandarin, Thundermedia's dvd only has the mandarin dub. Both tracks sounded similar to me with good separation in front and surrounds used for effects and ambience. However it's not the best produced track and the movie's low budget is being reflected in the audio. Not a bad experience though and certainly better than a crappy 5.1 remix seen on many other discs. Cantonese is probably the movies intended language but the mandarin dub works surprisingly well. After I got over the fact that I'm not used to listening to mandarin, the track turned out to be dubbed ok. It isn't a dialogue movie as such and after a while I forgot that it wasn't the intended language track.

Both versions feature burned in subs and they're identical at times but completely different in other scenes (see below) which is probably due to different translations was being done for the different asian territories. Thundermedia's translation seemed to be less error filled and the grammar present was better than most subtitles seen on cinema prints like these. Since it's dark movie, the subtitles are readable at all times which is a plus.

None of the discs has extras but Thundermedia's disc has a chinese menu (with play, select scenes and, what I guess is a text screen with the plot synopsis) and the Mei Ah one has no menu at all.

I'd recommend Thundermedia's dvd without hesitation. The lack of a cantonese track I thought would be a problem but in the end isn't. If you want to see the movie, go for this dvd. I didn't mention the R1 dvd but it's not worth talking about since it is cut, dubbed and rescored. End of story there!