Rhythm dot consolidation

I’ve attached a snippet from the layout options. I tried hard, but I couldn’t find a difference between the two options?!? Can someone explain this to me, please?

rhythm dot.JPG

There are a couple of duplicated pictures in Engraving Options, and that’s one of them. I will revisit them as soon as I can. (Actually, thinking about it, the other one might be in Notation Options, for rest grouping.)