In my experience, most mushrooms are fairly compatible.... But they will definitely fight for space. Some ricordea can really expand a lot, crowding out other shrooms of light... Some rhodactis can do this as well, but most often cling to the rock fairly closely, and they'll just starve. Discosama tend to stretch and get really long stalks if they aren't getting enough light.... when they start stretching though, they also start detaching.
So best advice.... Don't glue anything down until you test it for compatibility. Have the two frags you're planning on making neighbors next to each other for a while, and see if they sting each other, and if one tries to crowd the other.
Or just keep a couple of rocks for different types. A little ricordea garden, a little discosama garden, etc.
Yumas have little bumps or tentacles on their mouth, florida don't. Thats the easiest way to tell the difference between the two. Yumas also melt when you look at them, and Floridas don't, but of course after you get bit by the yuma bug, you want nothing but yumas, and 75% of the ones you buy end up melting. *sigh*