Switching 2009 macbook motherboard

Hi I would like switch the motherboard in my 2009 macbook with that of another macbook. Both macbooks look the same, my only question if i put the motherboard from the 2008 macbook inside the 2009 mabook, will apple be able to tell the difference?

does the motherboard have some sort of serial number that represents which year the macbook got released?


thanks!