User blog comment:Wilucas/Bloater and Butcher Seperated/@comment-11409759-20150404002531/@comment-26971153-20150407192857

Not really. I'm the one who separated the Nightmare Mode pages into SAS 3 and SAS 4. I also made the SAS 4 Devastator a page of its own.

However, I did this because Nightmare Mode is in both games, but it's completely different between the two. The sam goes for the devastator.

Butchers and Bloaters function the exact same way. High health, hih damage, slow, worms spawn after death, etc.