|I see what you are talking about. There is no diff between the two cpu's other then the socket diff itself.|
The T9300 - EC80576GG0606M supports a FCBGA6 socket using Ball-Grid Array.
The T9300 - FF80576GG0606M supports a Socket P socket using Pins.
If you are upgrading your laptop to one of these processors you need to know which socket your motherbaord supports first and then use the one that matches what socket your motherboard is.
Iron Sharpens Iron.