the core is fine, esp if you just want to check the system out.
Do you have a hdtv? Maybe you would prefer to buy a vga cable and use your monitor?
One difference to is cosmetic, the dvd tray on the core is white and not shiny.
If you buy the core you will need to buy a memory card or hdd. If you just want to check some games out, and you do not have a hdtv, then get the core and a memory card. if you like it, then you can buy the hdd.