What's the difference between the Simple and the Advanced Cart? ( and why are they the same price?)

The Simple cart, while very easy for even the most computer newbie to use, has only very simple features. It has very limited postage methods and payment methods. It cannot handle "attributes" ( i.e.: every colour of one product has to be entered as a separate product).

The Advanced Cart is quite a bit more complicated to learn, because it has a lot more features. For those who are new to computer stuff, the Basic Cart is ideal. For those who feel they can handle the more complicated one, and who might also have more "complicated" products, or postage fees, the Advanced cart s ideal.

All the Carts I use are Open Source- they are "free" ( free as in I can use them. change them, make them available for others to use...and I don't have to pay money for them. I DO have to leave the link to the creator though, which is fair enough.), so why should I charge people more to use a different cart when I didn't have to pay for either one anyway?