Ours used to look like sisterlimonpots when they were in very low light, now the colony is in very high light and flow. They ones on the underside still kinda look like that. Maybe ours look the way they do because they don't have a ton of only blue t5 bulbs or just real blue LEDs lighting the tank? I would not call the change of a polyp under a different light a morph, since they will change back if put into another lighting right? At least that's what the frags we cut have done. I have seen them look like almost every polyp in this thread depending on what tank or spot in the tank they go under.
Thanks for the comments, can we see a pic of yours?