Spoilers:
So it seems to stay on the neutral end you can still eat a lot of prey. I still got it by only leaving Daisy and the Vore Club so it seems 3 left is the magic number (Vore Club does count as 2, I wanted to see if May would still show up if they are gone, but she does not, nor do they show up if left alive for the pred ending). All the 3 classmates mom's will show up on the neutral ending, but Daisy's doesn't seem to have an option to be eaten while the others do. The Vore Club has a special interaction in the Neutral ending as listed above.
So the Neutral ending can have a lot of pred content both to get to it and on it. Though I feel like the Pred ending could include a lot of the content left for the Neutral one since you seem to skip over that part of Day 7 where the other mom's show up. I think an "ultimate pred" ending would include both and hanging with Daisy from the BFF DLC, but that's more of a head cannon thing.
Either way, a lot of pred options from a seemingly prey focused game.