Anybody who uses Drupal and is looking to sell products will ultimately come to this question. I'm gonna cut straight to the chase and say the better cart is Ubercart. I have used both and only have great things to say about Ubercart. I don't think it comes down to the type or size of the site you are building either. I'd use Ubercart for any site, large or small, auctions or no auctions, extreme customization or just plain and simple.
Let's start with what you SHOULDN'T use:
subscribing to my feed
Me!
