Any comments on choosing traction-enhancing material - grit - to add to floor or stair paint?

Say for outside concrete entrance steps, or for a basement utility room which can get wet.

Looks like there are several types retailed along with outdoor paint and floor paint/epoxy.
The different product "grits" are variously described as aluminum oxide, rubber, plastic (polyethylene or polypropylene).
Didn't see silica products on the first web search, but have vague recollections of a grandfather sprinkling (probably beach sand) in at some instinctive ratio when painting his outside...

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