Ask HN: Shopify or Magento?

I know there are a ton of other choices for e-commerece platforms but the business in need is a small/local Rock and Roll bar/restaurant that is interested in selling their own merchandise with a collection of other affiliate products that fit 'the vibe'. The store itself will have anywhere between 20-75 products, which is why I thought that Magento (Magento Go, to be more specific) and Shopify would probably be the easiest to get up and running. The Owner isn't very tech savvy himself, which is another reason I chose those two.

Any suggestions and advice is greatly appreciated!

Thanks in advance.