In the game setup screen we have little pictures of a galaxy:
gp_ring.png [ 87.42 KiB | Viewed 312 times ]
gp_irregular.png [ 83.91 KiB | Viewed 312 times ]
Many of them give you some idea about how the galaxy will be set up, others, especially "cluster" and "irregular", aren't very informative. And i don't really see how the retouched photo treatment can
give much of an idea of what these two types are like and how they are different.
I'd rather go with something practical if less pretty.