I will have to say it looks like a scoly to me also. Not being a coral ID expert myself, but I do believe they are in the same family as a acan and thus, can be called a acan. Either way its still beautiful!
Hard to say without seeing the skeleton when it's this small. Usually with a frag that tiny you can see the sides from where it was cut and look for signs that it came from a larger colony. Scolys are singular and won't show signs of coming from a larger colony.