What is the difference between the CO at Wally World and Vitacost, besides the price being extremely different?
There are basically two kinds of CO. Most manufactured CO is make from kopra (dried coconut meat) which is then re-hydrated and squeezed to get the oil out. This process can be clean using only hot water but sometimes not so much and other not so nice chemicals might be involved.
This first category can then be divided into two (aside from the chemical-free vs. not) which is deodorized or not. The deodorized has no smell (or, I'm assuming taste) whatsoever. The "not" still smells and tastes like coconut similar to the "virgin".
The second category is the one squeezed from fresh coconut meat as soon as the nut is broken open. Recently, this one has come to be called "virgin" or "extra virgin". If you like the taste/smell of coconut, this one is fantastic. It has a very fresh and wonderful taste and smell of fresh coconut. It tends to be substantially more expensive.
In areas where coconut oil is used traditionally, the factory-made type would be the one on the store shelf while the fresh-made would be made in homes or in small village factories. There are some like that in Kenya where customers can drop off their coconuts and then come back in a couple of days for their freshly made oil.
I believe they are nutritionally identical, so other than watching out for possible chemical contamination in the factory varieties, it all boils down to a matter of individual taste. I much prefer the "extra virgin" (get it from VitaCost) and I'm willing to pay a little extra for it.