Here's that review, Jonny:
http://10kbullets.com/reviews/l/last-house-on-the-beach-the-severin-films/
According to the reviewer at 10K Bullets, they look to be the same -- save for the Severin version is progressive (vs. interlaced).
Cool, still no mention that the Sazuma DVD comes with a bonus CD of the - still otherwise unavailable - soundtrack.
Yeah, no soundtrack included and what about the photo gallery, the German opening credits and the easter egg?
Sorta odd that the 10K Bullets, linked above states in their review:
"Severin Films North American DVD debut for Last House on the Beach comes with a stunning audio/video presentation that carries over most of the extras included on Sazuma Productions region 2 DVD."
I consider the CD score to be a pretty big extra, if not the main extra. The Severin disc appears to carry over "some" of the Sazuma extras, not "most" of them.