The quarterly combo pack will keep you active for three months at a monthly volume (pv) of 100. On the other hand, the mini bundle will keep you active for one month at a volume of 300 pv.
Keep in mind that if you want to remain active for three months without worrying about placing an order every month, will be likely recommended to place a Quarterly Combo order (We have different options for that one that combine the 3 available products we have available right now).
But if you want to get the whole amount in volume (While trying to work on achieving a higher rank) we will recommend you to purchase the mini bundle pack.