If they were both basically the same grain size then I would go with the cheaper of the two. You just don't want any pebbles or anything like that in the sand as it will be harder for it to work itself down into the canopy of the grass.
This post helped. I’m going back and forth between my options of masonry sand or screened fill sand. This screened fill sand “can also be used as a leveling course in many outdoor masonry applications, as a bed for an above ground pool, or to construct a sand volleyball court.” I think this maybe too rounded now.You want angular sand, not rounded sand. Best bet is to look for the same suppliers that your local golf courses use. I would expect beach sand to be rounded but you would need to confirm.