Whelp, I think this is at least the second time I and/or my game have been named dropped in a forum disagreement, only for me to come in belatedly after the fact and see that it has been all taken care of quite nicely already, so yay! I always miss the good fights (haha, just kidding, I can be socially anxious and that suits me just fine)
I don’t intend to stir the pot there. But since you asked for my input… 
In general, I find it hard to believe any story having to do with demonic lore or magic to be wholly independent without any overlap with other stories, since they tend to be based on myths, superstitions, and traditions that may well predate the written word, when much of human culture and morality tales were passed down through storytellers. But anyone who has read, for example, the earliest renditions of Cinderella all the way through to the most modern, knows that a lot can change through time and interpretation. What really sets a work apart is the individual authors’ tone, point of view, characters, and genre of choice. In that way, I may feel a healthy competition with some of my fellow writers, but only in the sense that it pushes me to want to do better when someone’s work blows me away. I tend to feel quite supportive of everyone else on here who I know is also working hard to bring their visions to life, no matter how closely aligned it may be with a work of mine or not.
I think they are quite different in that sense. And for me to feel personal ownership over the concepts of Heaven/Hell, angels/demons, morally gray or sarcastic demons, magic or things that at first glance would pass for magical, and possession, would be disingenuous indeed. As much as I love Vex’s seeming disdain for humans, I’m not sure we could stake a claim over the “monkey” insult, either. Just seems like a common sense evolutionary reference, if you happen to be a demon who considers the human race to be inferior. 
Heck, if anything, if a reader enjoys either SYP or this one and is looking for another to read, it just makes it that much easier for me or @Samuel_H_Young to be able to suggest our games to one another’s fan base. I’m all for supporting other HG authors since it buoys the brand as a whole. No need to feel threatened.
TL;DR
What does this WIP and SYP have in common? At first glance, a biting sense of humor and some similar supernatural lore that I in no way invented. Characters, time/setting, and stats are used very differently. I’d enjoy reading more. Good luck with it! Can’t we all just get along? 