But if you really wanted to, you could buy the core system if you didn't plan on using xbox live, or do not have a broadband connection in your house in the first place. Consequently, the cost of entry is lower on the 360, if you do not plan on using the harddrive, a high def connection, or wireless controllers. In other words, if you are on a budget or a lower income bracket, at least a cost-effective solution exists for the MS customer, whereas the lower income PS customer will most likely have to buy on credit or consider the lower cost alternatives. Value titles are also available now, which might make getting a core package, another controller, and a game or two more attractive than the barebones ps3 console.
All things being equal on the high-end however, yes, they are priced comparably.