They're kind of the same thing, just packaged differently.
Drip coffee bags are available for subscriptions, and one-off purchases. They are not individually wrapped, but come in a bag of 10. They are normally best consumed within a month for that fresh aroma and flavour we boast in all our coffees!
Hook Bags are available for one-off purchases only. Each drip coffee bag is individually wrapped with an outer aluminium packaging and nitrogen flushed. This extends their freshness and shelf-life by 1 year.