Yup they are 2 different things, like:
1. If you want to create/promote your own clickbank site it involves a lot of things and it requires a big ammount of money.
You will need an designer ( low to mid $xxx )
Copyrighter ( mid to high $xxx )
Depending on the product you will need an copyrighter if its an ebook, an programmer if its an software or an coder if its a script.
Clickbank fees
Fees to site where you can list your product to find affiliates
Fees to pay guys with lists to send emails
etc etc etc
It all depends on your product and how much money you want to make from it.
2. If you want to create/promote an affiliate clickbank website it's more simple:
* Create an blog/website
* Post some unique content to it
* SEO it and get #1
* Bank from it
Anyway nothing is simple, both require some time and money invested and none give you the guarantee that you will earn 1 cent from them
