.most likely split-mono) track instead of the fake 5.1 remixes and lossy Dolby mono track of the stateside HD disc.
Here's the specs over at DVDActive. Looks like the Blu-ray is the theatrical cut (Romero's preferred version) while the DVDs are Argento's cut and the Cannes Festival cut. Here's DVDActive's review as well (listed as region free). Note the screenshots aren't from the Blu-ray, scroll down to the bottom of the review and click the nine "Image" links for full resolution BD captures. It looks wonderful with grain (finally!), fine detail, and rich color absent from the smooth and sickly gray gloss of the Anchor Bay Blu-ray. The set is currently exclusive to HMV (listing here) for six months and then available everywhere in the U.K. afterward. I ordered a copy myself and will post my take upon receiving it. This film was a large portion of my reasoning buying into Blu-ray in the first place; just like in 1998 when I bought my first DVD player.
Anchor Bay Blu-ray (from Blu-ray.com) TOP / Arrow Blu-ray (from DVDActive.com) BOTTOM