I would agree with most of the comments here, you do not get much from moving to a secondary.
With that being said, personally, if I am not going to share the beer, I doing a single step fermentation. If I am sharing the beer, I rack it. I notice that when I don't rack the stout, the stout is a bit grainy and the particulate in the bottom of bottle and the glass is more. If I rack it, I can usually pour the whole bottle and the beer is clean.
Also, I have found with both my Wheat and Stout beers, I don't skimp on the Irish Moss. It is not about clarity, but the drop in protein. I find these two beers really benefit that it brings and the beer seems more crisp.
Just my observations.