QTR-Quadtone RIP

In the printing options, there is a pull-down menu for applying 
different dither algorithms (I assume these are applied during 
printing). The guide for Quadtone says that there is really no 
dicernable difference between these so the author leaves it at the 
default which I think is called "ordered."

I'm wondering if any of you can tell me what this option is for, what 
the differences are, and if they've found there to be a difference in 
selecting different algorithms. 

I'm printing, using my Epson 2400, for a specific purpose: printing on 
transparency film at 720 DPI, making digital "positives" for exposing 
etching plates. I tried a few of these different algorithms and at 
least in one case--with the second option, Adaptive Hybrid--I got 
banding in the print, though this could be because of the printer as 
well. 

Any info. here would be helpful. 
Best, David.