I'm pretty sure they are sun's,they look orange even in the photo's.Also with your sun coral looking that plump and healthy,theres a good chance that they did reproduce!They also look like they are kind of in random spots and if they were yellow polyps they would share a mat.
If they are suns,you should feel pretty lucky that doesnt happen in many tanks.Sun corals when they reproduce non asexually start as a little nub of flesh so i would assume that they will develope a skeleton later!
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