These different cake stands can actually be used for any type of event when decorated accordingly, but you need to take three things into consideration: 1) the kind of event you're planning, 2) the kind of cake you're having for the event, and; 3) the 'look' you wish to achieve with your display. Once you figure these out, you will then get a clearer picture of what cake stand you need, and what you can do with it to achieve the look you are aiming for.
Meanwhile, a pillared stand could usually display around three small cakes at the same time, each on different levels. It consists of smaller versions of the pedestal cake stand, but grouped together in such a way that a stair_like effect is achieved. Having your child's first birthday party? Use a pillared cake stand to separate your baby's smash cake from the cake your guests are having.