Gsp or pipe organ?

[Misha]

I have bought this coral months ago as gsp. It’s on a rock, back wall and another spot on my main structure. But I haven’t seen it in someone elses tank. Recently I saw a pipe organ, the polyps look the same Can someone id this for me?

If it is a pipe organ, can I leave it on the back wall?
How can I remove the coral from my main sructure? I tried ripping it of but that was no succes.

 

[Super Fly]

Looks like GSP to me. Near impossible to remove, best u can do is isolate it on its own rock island

 

[Dragon174]

GSP. Be careful as it looks like it is already starting to attach to the side / back of your tank. If you don't control it, it will spread very quickly (unless that is what you want). I don't have it in my tank for that exact reason.

 

[BeejReef]

Have been told it can be scraped off with a razor blade from flat surfaces like an overflow or back wall.
Pipe organs are referred to as soft corals in the hobby, but really look and feel like lps. If you bother them into retracting, there is a hard, stony skeleton.

 

[TomerF]

Looks like a pipe organ. I also was sold one as gsp.