[YeeHaw]

I think it really depends on how many products you need to display. If you have 200 products in a category, I think you'd want the user to be able to scan very quickly through all of them (via a grid), whereas if there are only a few, you'd want them to consider each product individually (vertical listing).

[westiseast]

That's my feeling too - perhaps it's also a function of how many products you think might be suitable for a person. eg. if I'm looking at iconfinder.com I like 100 to a page, in a grid, so I can scan the icons really fast, little scrolling. I'm going to eliminate 99% of the icons very quickly.

But with teas, it's perhaps not so obvious, so the vertical listing seems to work better to allow people to choose.