I've read Crown's materials were only so-so for some films and they even didn't have anything remotely decent for some others.
To answer your question...
The Gorehouse Greats Collection : DVD Talk Review of the DVD Video
"Prime Evil looks okay in its anamorphic 1.85.1 widescreen presentation, it's reasonably clean, despite some annoying compression artifacts and some distracting smearing."
Don't know about Lurkers.
I do know that some film's versions included in the BCI sets and the later Mill Creek sets can be different though.
For instance The Sidehackers has a widescreen transfer on BCI's old Fast Cars, Bikers & Babes set but apparently not on the newer Mill Creek Savage Cinema set.