Well, that's odd. Seems like if the products are good, the ones I linked to would be the better deal because there are 10 samples instead of 7-8 but I like the ones in your pictures so I'd rather have those.
When you put either of the boxes in your cart, it automatically applies a free shipping code. It should be noted, however, it doesn't say you'll receive the samples pictured; it says you'll receive seven samples from a list of brands (which happen to be the brands of the products pictured, so it seems like you would receive the samples in the pictures).
I also found this mystery box with 10 samples, also $18: