In the full moon storyline the red choice is after, when you don't give wolf's bane.
The green/red choices are called by the developer "good ending" "bad ending" and when there are 3 endings in one case "good ending" "bad ending" "worst ending" while in another "best ending" "good ending" "bad ending". Only in the case of bottom/encouraged route for Logan, or corrupted way/path for the lizards you have a more specific denomination, since they are requirements for other main events.
I suggest you to save before the bad ending to the curse of lust storyline, since the nameless storyline, the lizard treasure storyline and the orcs' war storyline if the tribe is corrupted are lacking content.
Speaking of Orcs' war, you can have a bad ending, but is not like the other bad ending, meaning is not made by simply choosing between two options, and a kinda bad ending that is not yet developed. If you want I can spoil you, but I'll wait for your permission only if you're interested.