hm...I'm wrong I guess lmao. I don't mean it negatively as well. I'm just having a wild guess. it's this one i think [link] I thought it might be either direct or indirect factor, that's just my honest thoughts after seeing your work, but then again i dont mean it something negatively, but rather an interesting find since it happens to me as well (with others pointing it out too).
if im wrong i guess my bad. And hey, why not try overlaying colours after not trying it for a while, you may come up with something a lot better now.
I was more than half-way into this piece before I saw that one you linked. I was surprised when I saw it simply because the theme was so similar heh (I also think his was executed better as well!). It's alright though, I can see this led to your assumption.
Lately overlaying has been a hit and miss - mostly missing. Sometimes it works and other times it looks gaudy.