Yes if you use a slurry stone it constantly keeps the surface refreshed and smooth but if you were trying to further refine the surface beyond that what a slurry stone can do to see if the edge can potentionally be greater refind then the slurry stone is useless. I think i agree with glen when saying the question really is "does a smooth surface actually make a better edge?" or does it just change the speed of the hone? And if thats the case why would anyone want a slower hone that doesn't make the edge better...When your doing a final polish on a coti you don't want any slurry or release of garnets at all, as you guys know. what you do want for the best polish is a hard smooth surface with the garnets only exposed slightly. So as glen pointed out the question is does a smoother polished surface prevent release of garnets and reduce their cutting above the hone's surface?
In my opinion which does not have much experience only from our discussion, to get beyond the limit of the coticule you got to go with a harder, smoother stone which is well...obvious. Because no matter how polished you make a coti the garnets will still act the same, their the same size as before and they will still get released. BUT thats an opinion with no evidence...