Acan vs Favia, need help to identify.

[Kovenant]

Hi, I bought this in my LFS as an Acan. What do you think, guys?

 

[fishface NJ]

favia

 

[nereefpat]

Not an Acan lord (Micromussa). Doesn't look like A. echinata either.

I agree it's either a Favia, or a Favites or Goniastrea....Despite my efforts, I can't tell the difference between those 3.