Follow me here....
Painting a broad stroke here.
Theist claim: There are triangles
Theism: Sees triangles
Atheism: Doesn't see triangles.
Your belief as a theist is a superstition because even though
you see triangles, it is a widely held fact that there are no triangles. You are holding a very common unjustified beliefs that triangles exist in this image and because millions believe as you do as well as it is written, you believe it is a fact.
It is not. If it were,
can you prove it without going by
your perspective of the image? (Ironically that's the fun part of the image, it's from your perspective not universally held).
Atheism (broad picture here) says there are no triangles.
To answer your question,
no, they are not under the same concept. We can actually dissemble the image so you can see for yourself that there are no triangles. A lot of us on RF have done so countless times. We gave you facts.
But some religious rather see the triangles (maybe they are in denial that there are not?). It is unjustified (there aren't facts that can support an actual triangle) so it is called a superstitious belief.
Nothing wrong with that.
I am not saying you are wrong. There are triangles there. Just you are interpreting your perspective and belief (superstition) as a fact. Why can't you accept what you experience in life is through your experience and perspective and
your justification; and, because it is not commonly held, it is defined as a superstition?
Nothing wrong with that.