Hall of Monuments pet stats
From my tests they actually are that bad and I already filed a bug report on day… 1? of headstart. Even now, especially after the pet update, I tried it again. Let your Raven attack something, a yellow not-so-bad enemy, and let your raven drop in health. Then pop in your heal (use Troll Unguent, not the straight heal) and look at the chunks of HP that regenerate.
The White Raven gets bigger chunks and thus faster hit points, meaning it has less vitality.
This forces me to not be able to use my White Raven. That makes me a sad Ranger