Store ownership or referral simplicity?
Neither model is universally better. The choice depends on whether you want to own the customer-facing shopping and support experience.

Branded reseller store
You can set your own storefront presentation and customer pricing, use a verified domain and manage orders. You also arrange supported payments, wholesale funding and customer support.
Affiliate referral
An affiliate may send customers to another company's checkout and avoid operating the transaction. Terms, attribution, commission and customer relationship depend on that specific program; this page does not compare any named program.
Choose based on capacity
If you have a relevant audience and can handle payment setup and after-sale service, a reseller store offers more control. If you need a lighter operational commitment, assess an affiliate agreement carefully.
Make the store your own.
Create a free merchant account, then prepare payments and wholesale funding before your first sale.
