What's the difference between VIP Credits and store credits?

VIP credit: You’ll receive a VIP credit if you don’t skip the month or if you return an order paid for with a VIP credit in full (e.g., a two-piece outfit). Your VIP credit comes as part of your VIP membership.

Store credit: A store credit is issued when you return part of an order that was paid for with a VIP credit. The value of the store credit will match the value of the returned items.