for the Abandon ending, I think there's something to be said about how Sunny considers going back to sleep a legitimate option to the point it's an option the player can choose to act on in the first place. I find it very funny to read through all the analyses about how deeply he cares for his best friend when it all can be disproven with this one screenshot

By this point in time, Sunny's remembered the truth. He is well-aware he needs to help Basil - to "save" him. It doesn't say anything positive about him, then, that he still contemplates leaving Basil alone.
There's also something to be said about the basic logistics of Basil's suicide - or, more precisely, the lack thereof. It's understandable that Polly and the gang were in shock when they found his body, but how come they called the ambulance only in the morning? it's particularly weird since they're much quicker to do so after Sunny and Basil fight.