Smaller galaxies are equipped with a smaller cloud of smaller dark matter Galaxy Anchor Black Holes (GABHs). Smaller Merger GABHs will find their place in the center of the larger galaxy between central GABHs of comparable size with less star formation potential due to less Herbig Haro forming postetial. (according to the dark matter black hole hierarchy of Quantum FFF theory)
see also:
https://www.flickr.com/photos/93308747@N05/17216711321/in/dateposted-public/
see also:
https://www.flickr.com/photos/93308747@N05/17216711321/in/dateposted-public/