Okay, after a bit of digging around, it seems you can not really tell one banana from another. I mean, you can obviously tell if one is a dwarf or perhaps the genus, but beyond that there seems to be too many variables to look at to easily figure out the type. A true expert might be able to break down all the points and figure it out, but a regular shmoe will just be left guessing. So I am guessing that I will just have to wait and see what happens.