So far from what I have noticed is growth over reproduction....
I have noticed the one that has left me babies or split is my sunkist and it seems that it moves due to competition with surrounding coral....possibly due to stress and leaves a baby everytime or it splits.
My OG has liked where it has been for months and just keeps getting bigger..... It has left 1 little spec of a baby but it gets covered by the skirt so it does not grow much at all.
I have what I call a zombie bounce and some call it a mellow yellow bounce (in the pic) I'm still not sure its exact name but it also just gets bigger without splitting or giving babies.
I wish I knew the exact science...
I spot feed the main mushrooms 3 times a week with...
Benepets
Reef roids
Oyster feast
Red sea AB+
I am very interested in getting them to split regularly!